The invention relates to a position recognition system which comprises an intelligent hay mower as well as a boundary guide line and at least one starting position identification object, wherein the boundary guide line is used to limit a working area of the intelligent hay mower; and the starting position identification object is arranged on the boundary guide line and used to guide the intelligent hay mower to start working from the starting position identification object. The intelligent hay mower comprises a sensing module of the boundary guide line and a sensing module of the starting position identification object, wherein the sensing module of the boundary guide line is used to guide the intelligent hay mower to move along the boundary guide line; and the sensing module of the starting position identification object is used to recognize one of starting position identification objects when the sensing module of the boundary guide line guides the intelligent hay mower to move along the boundary guide line, so the intelligent hay mower can start working from the recognized position identification object. With the system provided by the invention, lawns in different areas can be clipped uniformly.