Method for displaying and operating CAD drawing at Web front end

The invention discloses a method for displaying and operating a CAD drawing at a Web front end, and the method comprises the steps: a server packages a CAD drawing file into an agreed data exchange format, and transmitting the CAD drawing file to the Web front end making a request; a Web front end converts the data exchange format into an SVG file; the Web front end calls an operation command tooperate the SVG primitives displayed at the Web front end, and the Web front end modifies the displayed SVG primitives according to the operation command; the Web front end records the operation command or stores the modified SVG file; the operation command or the SVG file is packaged into the data exchange format and returning the data exchange format to the server side; and the server analyzes the data exchange format and converts the data exchange format into a CAD drawing or modifies the CAD drawing according to an operation instruction adapted to the operation command. Web display and modification can be carried o