A force bearing monitor apparatus for sports shoes includes a first accelerometer module located at a rear end of a sole of a shoe and a second accelerometer module located at a front end of the sole to measure alterations of a first acceleration and a second acceleration borne by the shoe when a user is stridden and stepped during running. Through generation sequence of the alterations of the first and second accelerations, an exercise mode is determined. And through processing of a first signal processing unit and an interrelation processing unit, a first reacting force and a second reacting force are derived, and the ratio of the first and second reacting forces is obtained to serve as a control factor to adjust softness and hardness of the sole. According to the exercise mode, the softness and hardness of the sole can be made in response to the ground.