diff --git a/trv/db.go b/trv/db.go
index 8e805e4..5c95c76 100644
--- a/trv/db.go
+++ b/trv/db.go
@@ -13,7 +13,9 @@ import (
 )
 
 type DB struct {
-	tables []Table
+	Tables []Table `json:"tables"`
+	Name   string  `json:"name"`
+	Desc   string  `json:"desc"`
 }
 
 // If there is DB data locally, load it and return it.
@@ -23,7 +25,7 @@ func (d *DB) loadData(repo, path string) {
 		log.Printf("loadData fail:%s", err)
 	}
 	raw, _ := ioutil.ReadFile(fmt.Sprintf("%s/.trv/%s-%s.json", home, repo, strings.Replace(path, "/", "-", -1)))
-	json.Unmarshal(raw, &d.tables)
+	json.Unmarshal(raw, &d.Tables)
 }
 
 // Store DB data locally.
@@ -37,7 +39,7 @@ func (d *DB) saveData(repo, path string) {
 			log.Printf("saveData fail:%s", err)
 		}
 	}
-	file, err := json.MarshalIndent(d.tables, "", " ")
+	file, err := json.MarshalIndent(d.Tables, "", " ")
 	if err != nil {
 		log.Printf("saveData fail:%s", err)
 	}
@@ -47,21 +49,39 @@ func (d *DB) saveData(repo, path string) {
 }
 
 func (d *DB) fetchDBInfo(client *github.Client, ctx context.Context, source Source) error {
-	_, contents, _, err := client.Repositories.GetContents(ctx, source.Owner, source.Repo, source.Path, nil)
-	if err != nil {
-		return fmt.Errorf("fech DB info fail:%w", err)
-	}
-	for _, v := range contents {
-		path := v.GetPath()
-		if strings.Contains(path, ".md") {
-			if strings.Contains(path, "README.md") {
-				continue
-			}
-			var table Table
-			if err := table.fetchTableInfo(client, ctx, source.Owner, source.Repo, path); err != nil {
-				return fmt.Errorf("fech DB info fail:%w", err)
+	content, _, _, _ := client.Repositories.GetContents(ctx, source.Owner, source.Repo, fmt.Sprintf("%s/schema.json", source.Path), nil)
+	if content != nil {
+		text, err := content.GetContent()
+		if err != nil {
+			return fmt.Errorf("fetch table info fail:%w", err)
+		}
+		var table DB
+		err = json.Unmarshal([]byte(text), &table)
+		if err != nil {
+			fmt.Println(err)
+		}
+		d.Tables = table.Tables
+	} else {
+		if len(d.Tables) != 0 {
+			return nil
+		}
+		// Processing in the absence of schema.json
+		_, contents, _, err := client.Repositories.GetContents(ctx, source.Owner, source.Repo, source.Path, nil)
+		if err != nil {
+			return fmt.Errorf("fech DB info fail:%w", err)
+		}
+		for _, v := range contents {
+			path := v.GetPath()
+			if strings.Contains(path, ".md") {
+				if strings.Contains(path, "README.md") {
+					continue
+				}
+				var table Table
+				if err := table.fetchTableInfoFromMarkdown(client, ctx, source.Owner, source.Repo, path); err != nil {
+					return fmt.Errorf("fech DB info fail:%w", err)
+				}
+				d.Tables = append(d.Tables, table)
 			}
-			d.tables = append(d.tables, table)
 		}
 	}
 	return nil
diff --git a/trv/source.go b/trv/source.go
index 9043408..42cbc6c 100644
--- a/trv/source.go
+++ b/trv/source.go
@@ -26,10 +26,6 @@ func (s Source) setDbData() (DB, error) {
 		return DB{}, err
 	}
 
-	if len(db.tables) != 0 {
-		return db, nil
-	}
-
 	if err := db.fetchDBInfo(client, ctx, s); err != nil {
 		return DB{}, fmt.Errorf("set DB data fail:%w", err)
 	}
diff --git a/trv/table.go b/trv/table.go
index c99111e..f26cfd0 100644
--- a/trv/table.go
+++ b/trv/table.go
@@ -10,16 +10,17 @@ import (
 )
 
 type Column struct {
-	Name    string
-	Type    string
-	Defaul  bool
-	Comment string
+	Name     string `json:"name"`
+	Type     string `json:"type"`
+	Nullable bool   `json:"nullable"`
+	Defaul   bool   `json:"default"`
+	Comment  string `json:"comment"`
 }
 type Table struct {
-	Name        string
-	Description string
-	Columns     []Column
-	UpdateDate  time.Time
+	Name        string    `json:"name"`
+	Description string    `json:"comment"`
+	Columns     []Column  `json:"columns"`
+	UpdateDate  time.Time `json:"tables"`
 }
 
 // return table_name.column_name
@@ -27,7 +28,7 @@ func (t Table) getFullName(i int) string {
 	return t.Name + "." + t.Columns[i].Name
 }
 
-func (t *Table) fetchTableInfo(client *github.Client, ctx context.Context, owner, repo, path string) error {
+func (t *Table) fetchTableInfoFromMarkdown(client *github.Client, ctx context.Context, owner, repo, path string) error {
 	content, _, _, err := client.Repositories.GetContents(ctx, owner, repo, path, nil)
 	if err != nil {
 		return fmt.Errorf("fetch table info fail:%w", err)
diff --git a/trv/trv.go b/trv/trv.go
index 7061eef..01344da 100644
--- a/trv/trv.go
+++ b/trv/trv.go
@@ -103,7 +103,7 @@ func (t *Trv) setSourceSelecter() error {
 				t.Pages.ShowPage("error")
 				return
 			}
-			t.Tables = t.DB.tables
+			t.Tables = t.DB.Tables
 			t.filterList()
 			t.App.SetFocus(t.Searcher)
 		})
@@ -125,7 +125,7 @@ func (t *Trv) addDropdownOption() error {
 	t.SourceSelecter.RemoveOption(currentOptionCount - 1)
 	t.SourceSelecter.AddOption(t.Source[lastOptionIndex], func() {
 		t.DB, err = t.Config.Source[lastOptionIndex].setDbData()
-		t.Tables = t.DB.tables
+		t.Tables = t.DB.Tables
 		t.filterList()
 		t.App.SetFocus(t.Searcher)
 	})