Method and system for transmitting instrument picture information and automatically testing aircraft

Provided is a method for transmitting instrument picture information, comprising: transmitting an inquiry message to a picture identification device, the inquiry message being encapsulated in a single data packet and conforming to a preset inquiry message format, the inquiry message at least comprising: a page field, a page to be identified by the picture identification device in an indicating instrument picture, and an object field, indicating an object whose information is to be identified in the page, and a keyword field indicating an identification category, the identification category being predefined based on display characteristics of the object; and receiving a response message from the picture identification device, the response message being encapsulated in a single data packet and meeting a preset response message format, the response message at least comprising: one or more load fields comprising an identification result corresponding to the identification category. The invention further discloses