1，所需資料

2，html

<table border="1">
   <thead>
      <tr>
         <td>開戶行</td>
         <td>賬號</td>
      </tr>
   </thead>
   <tbody id="myTable">

      <tr>
         <td>銀行</td>
 
         <td>1234567989874569874</td>
      </tr>

　　　<tr>
         <td>銀行</td>
         <td>1234567989874569874</td>
     </tr>

   </tbody>
</table>

3，js

var  banktrs=document.getElementById("myTable").rows;
var bankinfos = [];//新建一個數組
for(var i=0;i<banktrs.length;i++){
 

   var tds=banktrs[i].cells;
   var bankinfo={};
   bankinfo.bank=tds[0].innerHTML;
   bankinfo.account=tds[1].innerHTML;
    bankinfos.push(bankinfo);
}
alert(JSON.stringify(bankinfos));

4，結果
[{"bank":"工商銀行","account":"1234567989874569874"},{"bank":"建設銀行","account":"1234567989874569874"}]