The method for editing web data of the invention is applied to a web-editing system. The system receives a plurality of information via an internet. A user can use the system to edit the plurality of information. The method for editing web data comprises the following steps: displaying the plurality of information, a web-editing interface and a cursor, and when the cursor moves to one of the plurality of information, the one of the plurality of information appears with a selected effect; extracting the one of the plurality of information and showing on the web-editing interface when the user selects the one of the plurality of information; setting at least one parameter of the one of the plurality of information shown on the web-editing interface as editing information and displaying the editing information on the web-editing interface; converting the editing information to target editing information readable by an electronic device; and transferring the target editing information to the electronic device.