Abstract: A sport assistance system and a sport assistance method are provided. The sport assistance method includes: obtaining a real-time heart rate; executing a first assistance procedure according to a target heart rate, a maximum heart rate, a resting heart rate, a first media and the real-time heart rate; and executing a second assistance procedure according to the target heart rate and the real-time heart rate. The first assistance procedure includes: playing the first media at a first tempo rate; and adjusting the first tempo rate according to the real-time heart rate until the real-time heart rate is close to the target heart rate and a first scheduled time is met. The first initial value is greater than the resting heart rate. The second assistance procedure includes: playing a second media; and adjusting a second tempo rate according to an adjustment parameter until a second scheduled time is met.