The embodiment of the invention relates to the technical field of display, and discloses a detection method and a detection device for a display panel. The invention provides a detection method for the display panel, which comprises the following steps: inputting a test signal to the input end of each pixel driving circuit of the display panel to be detected, so that each pixel driving circuit forms an electric field; sensing an electric field of each pixel driving circuit by utilizing the liquid crystal module so as to enable liquid crystal in the liquid crystal module to generate test deflection; acquiring test deflection information of liquid crystal in the liquid crystal module; and determining whether the to-be-tested display panel is qualified or not according to the test deflectioninformation. According to the detection method and the detection device for the display panel provided by the embodiment of the invention, the detection method of the array substrate is provided, theoperation is simple, the manpower is saved, and the test result is accurate.