The invention discloses a positioning method and a positioning system with automatic positioning frequency adjusting functions. The method comprises the following steps: step 1, executing an initial positioning operation, uploading initial positioning location data to a server, and acquiring a current initial location state parameter and storing the parameter by a motion detection device; step 2, real-timely detecting the state parameter of the current location by the motion detection device; step 3, comparing the real-timely detected state parameter with a previous stored state parameter, and implementing step 4 when a triggering condition is achieved; otherwise, returning to step 2; and step 4, triggering a positioning operation, uploading positioning location data to the server, and returning to the step 2. According to the positioning method and the positioning system disclosed by the invention, the positioning frequency can be automatically adjusted according to the location of a positioning device so as to ensure that positioning tracks on maps can be clearer and smoother, and moving tracks of the positioning device can be reflected more accurately; and meanwhile, when the positioning device is stationary, positioning cannot be triggered, and thus the electricity can be saved.