The invention discloses a control method for electromagnetic field map display, a control device for electromagnetic field map display and a server, wherein the method comprises the following steps: acquiring electromagnetic field measuring point information for identifying an electric filed and/or a magnetic field of an electromagnetic field measuring point; according to the electromagnetic fieldmeasuring point information, determining features of the electric field and/or the magnetic field of the electromagnetic field measuring point; calling a JavaScript library provided by an ArcGIS in JavaScript codes corresponding to a client side browser page, thereby controlling display of the determined features of the electric field and/or the magnetic field of the electromagnetic field measuring point on a map of the client side browser page. With the method, the device and the server provided by the invention, a technical problem of waste of time and energy and extremely low efficiency caused by using a uniprocessor version desktop GIS software in related technologies is solved.