The embodiment of the invention provides a projection mode identification method, a video play method and device, and an electronic device. The projection mode identification method comprises the steps of: extracting multiple image frames from a video to be processed; extracting feature points in the multiple image frames; comparing the feature points of the multiple image frames, and determiningtarget feature points with the same distribution positions in the multiple image frames; and determining a target projection mode corresponding to the video to be processed according to the distribution positions of the target feature points and the distribution positions of preset feature points corresponding to different projection modes. The projection mode identification method, the video playmethod and device, and the electronic device provided by the embodiment of the invention improve the identification efficiency and the identification accuracy.