The invention relates to an intelligent fitness bicycle system and an application method. The intelligent fitness bicycle system comprises a fitness bicycle body, a cloud server and a fitness bicyclecontroller and projector, wherein the fitness bicycle body comprises a bottom support, a bicycle body skeleton, a seat, a left pedal, a right pedal, a direction control handle and a suspension wheel,and the bicycle body skeleton, the seat, the left pedal, the right pedal, the direction control handle and the suspension wheel are installed on the bottom support; a rotating disc rotating along withthe left pedal and the right pedal is arranged between the left pedal and the right pedal, the suspension wheel is linked with the rotating disc through a chain, the bottom support is fixed on the ground, the bicycle body skeleton is fixed on the ground, the seat, the left pedal and the right pedal are each provided with a weight sensor, and a rotating-speed sensor is arranged on the rotating disc. According to the intelligent fitness bicycle system and the application method, by adjusting the inclination angle of the bicycle body skeleton and simulating a real journey, realer riding experiences can be obtained by inserting landmark building pictures into preset streetscape videos.