The invention relates to an energy-saving and maintenance-free integrated rainwater collection and filtering system which comprises a groove. The groove is internally provided with two or more groove positions which are connected through transition pieces. The transition pieces are lower than the highest water receiving face. A rainwater collection structure comprises two or more energy-saving and maintenance-free integrated rainwater collection and filtering systems, rainwater hoppers and guiding pipe fittings. The two ends of the rainwater hoppers are separately connected with the energy-saving and maintenance-free integrated rainwater collection and filtering systems. The guiding pipe fittings are arranged on the lower portions of the rainwater hoppers and communicate with the rainwater hoppers. The energy-saving and maintenance-free integrated rainwater collection and filtering system can well collect rainwater and achieve a leading function particularly during heavy rain in summer, and the bad phenomena such as overflowing are avoided.