The invention relates to a coach assisting system, and provides a coach assisting system applied to a sports scene; and the coach assisting system is used for conducting assisted coaching on athletes when the athletes are on the sports scene. The coach assisting system comprises wearable sensor equipment, a portable communication gateway, and a mobile client, wherein the wearable sensor equipment is used for collecting data, transmitting the data to the portable communication gateway and reminding the athlete in accordance with feedback information transmitted by the mobile client; the portable communication gateway is applicable to data forwarding between the wearable sensor equipment and the mobile client; and the mobile client is used for calculating and summarizing the data, presenting the data to the coach and transmitting the feedback information in accordance with an instruction of the coach. The coach assisting system disclosed by the invention is suitable for conducing assisted coaching on the athletes.