The invention discloses a method and a device for acquiring application data on different operating system terminals, and belongs to the field of computers. The method comprises: sending a second terminal identification and password to a second terminal; when matching verification of the second terminal identification and password is successful on the second terminal, establishing control connection with the second terminal; sending a storage request to a server; receiving a server storage space identification, and sending the storage space identification to the second terminal; through the control connection, controlling the second terminal to run an application program on the second terminal to obtain application data, and controlling the second terminal to store the application data into the storage space; and acquiring and displaying running results of the application program on the second terminal in real time, and acquiring the application data from the storage space. The device comprises a first sending module, a connecting module, a second sending module, a third sending module, a controlling module and a first acquiring module. Through the adoption of the method and the device, the application data on the second terminal can be acquired very conveniently.