Graph recognition method, device and system and terminal device

The embodiment of the invention discloses a graph recognition method, device and system and a terminal device. The method includes the steps of firstly, scanning a target image, and analyzing the target image on the basis of a preset graphic code processing library; secondly, if matched graphic code information is obtained through analysis, determining the target image to be a graphic code and outputting the graphic code information obtained through analysis and matched with the graphic code; if analysis fails, shooting the target image to obtain images to be recognized including the target image, sending the obtained images to be recognized to a server, and receiving content information which is returned after the server recognizes image features of the target image and matched with the recognized image features. By means of the graph recognition method, device and system and the terminal device, software and hardware resource waste caused by switching initiated in the prior art can be avoided, cost is saved