diff --git a/data/dl.go b/data/dl.go
new file mode 100644
index 00000000..69fb606e
--- /dev/null
+++ b/data/dl.go
@@ -0,0 +1,21 @@
+package data
+
+import (
+	"io"
+	"net/http"
+	"os"
+)
+
+func DownloadTo(url, file string) error {
+	resp, err := http.Get(url)
+	if err == nil {
+		var f *os.File
+		f, err = os.Create(file)
+		if err == nil {
+			_, err = io.Copy(f, resp.Body)
+			resp.Body.Close()
+			f.Close()
+		}
+	}
+	return err
+}
diff --git a/data/mem.go b/data/mem.go
new file mode 100644
index 00000000..1f2b07f0
--- /dev/null
+++ b/data/mem.go
@@ -0,0 +1,15 @@
+package data
+
+import "unsafe"
+
+// Str2bytes Fast convert
+func Str2bytes(s string) []byte {
+	x := (*[2]uintptr)(unsafe.Pointer(&s))
+	h := [3]uintptr{x[0], x[1], x[1]}
+	return *(*[]byte)(unsafe.Pointer(&h))
+}
+
+// Bytes2str Fast convert
+func Bytes2str(b []byte) string {
+	return *(*string)(unsafe.Pointer(&b))
+}
diff --git a/plugin_diana/data/text.go b/plugin_diana/data/text.go
index d5e7325e..2d38f46b 100644
--- a/plugin_diana/data/text.go
+++ b/plugin_diana/data/text.go
@@ -8,8 +8,8 @@ import (
 	"os"
 	"sync"
 	"time"
-	"unsafe"
 
+	"github.com/FloatTech/ZeroBot-Plugin/data"
 	log "github.com/sirupsen/logrus"
 )
 
@@ -42,7 +42,7 @@ func init() {
 			log.Printf("[Diana]读取%d条小作文", arrl)
 			md5s = make([]*[16]byte, arrl)
 			for i, t := range *Array {
-				m := md5.Sum(str2bytes(t))
+				m := md5.Sum(data.Str2bytes(t))
 				md5s[i] = &m
 			}
 		} else {
@@ -92,7 +92,7 @@ func LoadText() error {
 
 // AddText 添加小作文
 func AddText(txt string) error {
-	sum := md5.Sum(str2bytes(txt))
+	sum := md5.Sum(data.Str2bytes(txt))
 	if txt != "" && !isin(&sum) {
 		m.Lock()
 		defer m.Unlock()
@@ -128,10 +128,3 @@ func savecompo() error {
 	}
 	return err
 }
-
-// str2bytes Fast convert
-func str2bytes(s string) []byte {
-	x := (*[2]uintptr)(unsafe.Pointer(&s))
-	h := [3]uintptr{x[0], x[1], x[1]}
-	return *(*[]byte)(unsafe.Pointer(&h))
-}
diff --git a/plugin_fortune/cfg.pb.go b/plugin_fortune/cfg.pb.go
new file mode 100644
index 00000000..98e0f2c9
--- /dev/null
+++ b/plugin_fortune/cfg.pb.go
@@ -0,0 +1,405 @@
+// Code generated by protoc-gen-gogo. DO NOT EDIT.
+// source: cfg.proto
+
+package fortune
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	io "io"
+	math "math"
+	math_bits "math/bits"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+type Conf struct {
+	Kind                 map[int64]uint32 `protobuf:"bytes,1,rep,name=kind,proto3" json:"kind,omitempty" protobuf_key:"varint,1,opt,name=key,proto3" protobuf_val:"varint,2,opt,name=value,proto3"`
+	XXX_NoUnkeyedLiteral struct{}         `json:"-"`
+	XXX_unrecognized     []byte           `json:"-"`
+	XXX_sizecache        int32            `json:"-"`
+}
+
+func (m *Conf) Reset()         { *m = Conf{} }
+func (m *Conf) String() string { return proto.CompactTextString(m) }
+func (*Conf) ProtoMessage()    {}
+func (*Conf) Descriptor() ([]byte, []int) {
+	return fileDescriptor_f81ba022997f8a9d, []int{0}
+}
+func (m *Conf) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *Conf) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_Conf.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *Conf) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Conf.Merge(m, src)
+}
+func (m *Conf) XXX_Size() int {
+	return m.Size()
+}
+func (m *Conf) XXX_DiscardUnknown() {
+	xxx_messageInfo_Conf.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Conf proto.InternalMessageInfo
+
+func (m *Conf) GetKind() map[int64]uint32 {
+	if m != nil {
+		return m.Kind
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*Conf)(nil), "fortune.conf")
+	proto.RegisterMapType((map[int64]uint32)(nil), "fortune.conf.KindEntry")
+}
+
+func init() { proto.RegisterFile("cfg.proto", fileDescriptor_f81ba022997f8a9d) }
+
+var fileDescriptor_f81ba022997f8a9d = []byte{
+	// 154 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xe2, 0x4c, 0x4e, 0x4b, 0xd7,
+	0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0x62, 0x4f, 0xcb, 0x2f, 0x2a, 0x29, 0xcd, 0x4b, 0x55, 0xca,
+	0xe1, 0x62, 0x49, 0xce, 0xcf, 0x4b, 0x13, 0xd2, 0xe6, 0x62, 0xc9, 0xce, 0xcc, 0x4b, 0x91, 0x60,
+	0x54, 0x60, 0xd6, 0xe0, 0x36, 0x12, 0xd7, 0x83, 0xca, 0xeb, 0x81, 0x24, 0xf5, 0xbc, 0x33, 0xf3,
+	0x52, 0x5c, 0xf3, 0x4a, 0x8a, 0x2a, 0x83, 0xc0, 0x8a, 0xa4, 0xcc, 0xb9, 0x38, 0xe1, 0x42, 0x42,
+	0x02, 0x5c, 0xcc, 0xd9, 0xa9, 0x95, 0x12, 0x8c, 0x0a, 0x8c, 0x1a, 0xcc, 0x41, 0x20, 0xa6, 0x90,
+	0x08, 0x17, 0x6b, 0x59, 0x62, 0x4e, 0x69, 0xaa, 0x04, 0x93, 0x02, 0xa3, 0x06, 0x6f, 0x10, 0x84,
+	0x63, 0xc5, 0x64, 0xc1, 0xe8, 0x24, 0x70, 0xe2, 0x91, 0x1c, 0xe3, 0x85, 0x47, 0x72, 0x8c, 0x0f,
+	0x1e, 0xc9, 0x31, 0xce, 0x78, 0x2c, 0xc7, 0x90, 0xc4, 0x06, 0x76, 0x8f, 0x31, 0x20, 0x00, 0x00,
+	0xff, 0xff, 0x8a, 0xa2, 0xbe, 0x9e, 0x9c, 0x00, 0x00, 0x00,
+}
+
+func (m *Conf) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *Conf) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *Conf) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.XXX_unrecognized != nil {
+		i -= len(m.XXX_unrecognized)
+		copy(dAtA[i:], m.XXX_unrecognized)
+	}
+	if len(m.Kind) > 0 {
+		for k := range m.Kind {
+			v := m.Kind[k]
+			baseI := i
+			i = encodeVarintCfg(dAtA, i, uint64(v))
+			i--
+			dAtA[i] = 0x10
+			i = encodeVarintCfg(dAtA, i, uint64(k))
+			i--
+			dAtA[i] = 0x8
+			i = encodeVarintCfg(dAtA, i, uint64(baseI-i))
+			i--
+			dAtA[i] = 0xa
+		}
+	}
+	return len(dAtA) - i, nil
+}
+
+func encodeVarintCfg(dAtA []byte, offset int, v uint64) int {
+	offset -= sovCfg(v)
+	base := offset
+	for v >= 1<<7 {
+		dAtA[offset] = uint8(v&0x7f | 0x80)
+		v >>= 7
+		offset++
+	}
+	dAtA[offset] = uint8(v)
+	return base
+}
+func (m *Conf) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if len(m.Kind) > 0 {
+		for k, v := range m.Kind {
+			_ = k
+			_ = v
+			mapEntrySize := 1 + sovCfg(uint64(k)) + 1 + sovCfg(uint64(v))
+			n += mapEntrySize + 1 + sovCfg(uint64(mapEntrySize))
+		}
+	}
+	if m.XXX_unrecognized != nil {
+		n += len(m.XXX_unrecognized)
+	}
+	return n
+}
+
+func sovCfg(x uint64) (n int) {
+	return (math_bits.Len64(x|1) + 6) / 7
+}
+func sozCfg(x uint64) (n int) {
+	return sovCfg(uint64((x << 1) ^ uint64((int64(x) >> 63))))
+}
+func (m *Conf) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowCfg
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: conf: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: conf: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Kind", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowCfg
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthCfg
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthCfg
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.Kind == nil {
+				m.Kind = make(map[int64]uint32)
+			}
+			var mapkey int64
+			var mapvalue uint32
+			for iNdEx < postIndex {
+				entryPreIndex := iNdEx
+				var wire uint64
+				for shift := uint(0); ; shift += 7 {
+					if shift >= 64 {
+						return ErrIntOverflowCfg
+					}
+					if iNdEx >= l {
+						return io.ErrUnexpectedEOF
+					}
+					b := dAtA[iNdEx]
+					iNdEx++
+					wire |= uint64(b&0x7F) << shift
+					if b < 0x80 {
+						break
+					}
+				}
+				fieldNum := int32(wire >> 3)
+				if fieldNum == 1 {
+					for shift := uint(0); ; shift += 7 {
+						if shift >= 64 {
+							return ErrIntOverflowCfg
+						}
+						if iNdEx >= l {
+							return io.ErrUnexpectedEOF
+						}
+						b := dAtA[iNdEx]
+						iNdEx++
+						mapkey |= int64(b&0x7F) << shift
+						if b < 0x80 {
+							break
+						}
+					}
+				} else if fieldNum == 2 {
+					for shift := uint(0); ; shift += 7 {
+						if shift >= 64 {
+							return ErrIntOverflowCfg
+						}
+						if iNdEx >= l {
+							return io.ErrUnexpectedEOF
+						}
+						b := dAtA[iNdEx]
+						iNdEx++
+						mapvalue |= uint32(b&0x7F) << shift
+						if b < 0x80 {
+							break
+						}
+					}
+				} else {
+					iNdEx = entryPreIndex
+					skippy, err := skipCfg(dAtA[iNdEx:])
+					if err != nil {
+						return err
+					}
+					if (skippy < 0) || (iNdEx+skippy) < 0 {
+						return ErrInvalidLengthCfg
+					}
+					if (iNdEx + skippy) > postIndex {
+						return io.ErrUnexpectedEOF
+					}
+					iNdEx += skippy
+				}
+			}
+			m.Kind[mapkey] = mapvalue
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipCfg(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthCfg
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func skipCfg(dAtA []byte) (n int, err error) {
+	l := len(dAtA)
+	iNdEx := 0
+	depth := 0
+	for iNdEx < l {
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return 0, ErrIntOverflowCfg
+			}
+			if iNdEx >= l {
+				return 0, io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		wireType := int(wire & 0x7)
+		switch wireType {
+		case 0:
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowCfg
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				iNdEx++
+				if dAtA[iNdEx-1] < 0x80 {
+					break
+				}
+			}
+		case 1:
+			iNdEx += 8
+		case 2:
+			var length int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowCfg
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				length |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if length < 0 {
+				return 0, ErrInvalidLengthCfg
+			}
+			iNdEx += length
+		case 3:
+			depth++
+		case 4:
+			if depth == 0 {
+				return 0, ErrUnexpectedEndOfGroupCfg
+			}
+			depth--
+		case 5:
+			iNdEx += 4
+		default:
+			return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
+		}
+		if iNdEx < 0 {
+			return 0, ErrInvalidLengthCfg
+		}
+		if depth == 0 {
+			return iNdEx, nil
+		}
+	}
+	return 0, io.ErrUnexpectedEOF
+}
+
+var (
+	ErrInvalidLengthCfg        = fmt.Errorf("proto: negative length found during unmarshaling")
+	ErrIntOverflowCfg          = fmt.Errorf("proto: integer overflow")
+	ErrUnexpectedEndOfGroupCfg = fmt.Errorf("proto: unexpected end of group")
+)
diff --git a/plugin_fortune/cfg.proto b/plugin_fortune/cfg.proto
new file mode 100644
index 00000000..89f8579f
--- /dev/null
+++ b/plugin_fortune/cfg.proto
@@ -0,0 +1,6 @@
+syntax = "proto3";
+package fortune;
+
+message conf {
+  map<int64, uint32> kind = 1;
+}
diff --git a/plugin_fortune/data.go b/plugin_fortune/data.go
new file mode 100644
index 00000000..5b68078c
--- /dev/null
+++ b/plugin_fortune/data.go
@@ -0,0 +1,51 @@
+package fortune
+
+import (
+	io "io"
+	"os"
+	"sync"
+)
+
+var (
+	conf Conf
+	mu   sync.Mutex
+)
+
+func loadcfg(name string) error {
+	name = base + name
+	if _, err := os.Stat(name); err == nil || os.IsExist(err) {
+		f, err := os.Open(name)
+		if err == nil {
+			defer f.Close()
+			data, err1 := io.ReadAll(f)
+			if err1 == nil {
+				if len(data) > 0 {
+					return conf.Unmarshal(data)
+				}
+			}
+			return err1
+		}
+	} else { // 如果没有 cfg，则使用空 map
+		conf.Kind = make(map[int64]uint32)
+	}
+	return nil
+}
+
+func savecfg(name string) error {
+	name = base + name
+	data, err := conf.Marshal()
+	if err == nil {
+		if _, err := os.Stat(base); err == nil || os.IsExist(err) {
+			f, err1 := os.OpenFile(name, os.O_WRONLY|os.O_TRUNC|os.O_CREATE, 0644)
+			if err1 == nil {
+				mu.Lock()
+				_, err2 := f.Write(data)
+				f.Close()
+				mu.Unlock()
+				return err2
+			}
+			return err1
+		}
+	}
+	return err
+}
diff --git a/plugin_fortune/fortune.go b/plugin_fortune/fortune.go
index a9565fe1..9ae81683 100644
--- a/plugin_fortune/fortune.go
+++ b/plugin_fortune/fortune.go
@@ -6,16 +6,12 @@ import (
 	"bytes"
 	"encoding/base64"
 	"encoding/json"
-	"errors"
 	"image/jpeg"
 	"io"
 	"io/ioutil"
 	"math/rand"
-	"net/http"
-	"net/url"
 	"os"
 	"strconv"
-	"strings"
 	"time"
 
 	"github.com/fogleman/gg"
@@ -23,6 +19,7 @@ import (
 	"github.com/wdvxdr1123/ZeroBot/message"
 
 	"github.com/FloatTech/ZeroBot-Plugin/control"
+	"github.com/FloatTech/ZeroBot-Plugin/data"
 )
 
 var (
@@ -30,27 +27,49 @@ var (
 	base = "data/fortune/"
 	// 素材下载网站
 	site = "https://pan.dihe.moe/fortune/"
-	// int64 群号 string 底图类型
 	// 底图类型列表：车万 DC4 爱因斯坦 星空列车 樱云之恋 富婆妹 李清歌
 	// 				公主连结 原神 明日方舟 碧蓝航线 碧蓝幻想 战双 阴阳师
-	table = map[int64]string{
-		0:          "车万",
-		1048452984: "爱因斯坦",
-	}
+	table = [...]string{"车万", "DC4", "爱因斯坦", "星空列车", "樱云之恋", "富婆妹", "李清歌", "公主连结", "原神", "明日方舟", "碧蓝航线", "碧蓝幻想", "战双", "阴阳师"}
+	// 映射底图与 index
+	index = make(map[string]uint32)
 )
 
 func init() {
+	err := loadcfg("cfg.pb")
+	if err != nil {
+		panic(err)
+	}
+	for i, s := range table {
+		index[s] = uint32(i)
+	}
+	err = os.MkdirAll(base, 0755)
+	if err != nil {
+		panic(err)
+	}
 	// 插件主体
-	control.Register("fortune", &control.Options{
+	en := control.Register("fortune", &control.Options{
 		DisableOnDefault: false,
 		Help: "每日运势: \n" +
-			"- 运势",
-	}).OnFullMatchGroup([]string{"运势", "抽签"}).SetBlock(true).SecondPriority().
+			"- 运势\n" +
+			"- 设置底图[车万 DC4 爱因斯坦 星空列车 樱云之恋 富婆妹 李清歌 公主连结 原神 明日方舟 碧蓝航线 碧蓝幻想 战双 阴阳师]",
+	})
+	en.OnRegex(`^设置底图(.*)`, zero.OnlyGroup).SetBlock(true).SecondPriority().
+		Handle(func(ctx *zero.Ctx) {
+			i, ok := index[ctx.State["regex_matched"].([]string)[1]]
+			if ok {
+				conf.Kind[ctx.Event.GroupID] = i
+				savecfg("cfg.pb")
+			} else {
+				ctx.Send("没有这个底图哦～")
+			}
+		})
+	en.OnFullMatchGroup([]string{"运势", "抽签"}).SetBlock(true).SecondPriority().
 		Handle(func(ctx *zero.Ctx) {
 			// 检查签文文件是否存在
-			if _, err := os.Stat(base + "运势签文.json"); err != nil && !os.IsExist(err) {
+			mikuji := base + "运势签文.json"
+			if _, err := os.Stat(mikuji); err != nil && !os.IsExist(err) {
 				ctx.SendChain(message.Text("正在下载签文文件，请稍后..."))
-				_, err := download(site+"运势签文.json", base)
+				err := data.DownloadTo(site+"运势签文.json", mikuji)
 				if err != nil {
 					ctx.SendChain(message.Text("ERROR: ", err))
 					return
@@ -58,37 +77,40 @@ func init() {
 				ctx.SendChain(message.Text("下载签文文件完毕"))
 			}
 			// 检查字体文件是否存在
-			if _, err := os.Stat(base + "sakura.ttf"); err != nil && !os.IsExist(err) {
+			ttf := base + "sakura.ttf"
+			if _, err := os.Stat(ttf); err != nil && !os.IsExist(err) {
 				ctx.SendChain(message.Text("正在下载字体文件，请稍后..."))
-				_, err := download(site+"sakura.ttf", base)
+				err := data.DownloadTo(site+"sakura.ttf", ttf)
 				if err != nil {
 					ctx.SendChain(message.Text("ERROR: ", err))
 					return
 				}
 				ctx.SendChain(message.Text("下载字体文件完毕"))
 			}
-			// 获取该群背景类型
-			var kind string
-			if v, ok := table[ctx.Event.GroupID]; ok {
-				kind = v
-			} else {
-				kind = table[0]
+			// 获取该群背景类型，默认车万
+			kind := "车万"
+			if v, ok := conf.Kind[ctx.Event.GroupID]; ok {
+				kind = table[v]
 			}
 			// 检查背景图片是否存在
-			if _, err := os.Stat(base + kind); err != nil && !os.IsExist(err) {
+			folder := base + kind
+			if _, err := os.Stat(folder); err != nil && !os.IsExist(err) {
 				ctx.SendChain(message.Text("正在下载背景图片，请稍后..."))
-				file, err := download(site+kind+".zip", base)
+				zipfile := kind + ".zip"
+				err := data.DownloadTo(site+zipfile, zipfile)
 				if err != nil {
 					ctx.SendChain(message.Text("ERROR: ", err))
 					return
 				}
 				ctx.SendChain(message.Text("下载背景图片完毕"))
-				err = unpack(file, base+kind+"/")
+				err = unpack(zipfile, folder+"/")
 				if err != nil {
 					ctx.SendChain(message.Text("ERROR: ", err))
 					return
 				}
 				ctx.SendChain(message.Text("解压背景图片完毕"))
+				// 释放空间
+				os.Remove(zipfile)
 			}
 			// 生成种子
 			t, _ := strconv.ParseInt(time.Now().Format("20060102"), 10, 64)
@@ -106,58 +128,16 @@ func init() {
 				return
 			}
 			// 绘制背景
-			data, err := draw(background, title, text)
+			d, err := draw(background, title, text)
 			if err != nil {
 				ctx.SendChain(message.Text("ERROR: ", err))
 				return
 			}
 			// 发送图片
-			ctx.SendChain(message.Image("base64://" + string(data)))
+			ctx.SendChain(message.Image("base64://" + data.Bytes2str(d)))
 		})
 }
 
-// @function download 下载资源包
-// @param link 下载链接
-// @param dest 下载位置
-// @return 文件路径 & 错误信息
-func download(link, dest string) (string, error) {
-	// 路径目录不存在则创建目录
-	if _, err := os.Stat(dest); err != nil && !os.IsExist(err) {
-		if err := os.MkdirAll(dest, 0755); err != nil {
-			panic(err)
-		}
-	}
-	client := &http.Client{}
-	// 网络请求
-	request, _ := http.NewRequest("GET", link, nil)
-	request.Header.Set("Accept", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0) Gecko/20100101 Firefox/6.0")
-	resp, err := client.Do(request)
-	if err != nil {
-		return "", err
-	}
-	defer resp.Body.Close()
-	// 验证接收到的长度
-	length, _ := strconv.Atoi(resp.Header.Get("Content-Length"))
-	data, _ := ioutil.ReadAll(resp.Body)
-	if length > len(data) {
-		return "", errors.New("download not complete")
-	}
-	// 获取文件名
-	temp := strings.Split(resp.Header.Get("Content-Disposition"), "\"")
-	name, _ := url.QueryUnescape(temp[len(temp)-2])
-	// 写入文件
-	f, err := os.OpenFile(dest+name, os.O_WRONLY|os.O_TRUNC|os.O_CREATE, 0644)
-	if err != nil {
-		return "", err
-	}
-	defer f.Close()
-	_, err = f.Write(data)
-	if err != nil {
-		return "", err
-	}
-	return dest + name, nil
-}
-
 // @function unpack 解压资源包
 // @param tgt 压缩文件位置
 // @param dest 解压位置