A cycling-posture analyzing system and method are provided. The cycling-posture analyzing system includes a plurality of motion sensors, a pressure sensor and an electronic device. The plurality of motion sensors are disposed on a human body and are configured to detect a plurality of pieces of motion information. The pressure sensor is disposed at a plantar aspect of the human body and is configured to detect pressure information. The electronic device is configured to receive the plurality of pieces of motion information from the plurality of motion sensors, receive the pressure information from the pressure sensor, and use the plurality of pieces of motion information and the pressure information to determine cycling-posture type information according to a cycling-posture identification model.