A motion sensing data collecting system including: a plurality of user terminal ends each having a wearable sensing device for sensing a set of motion data of a motion combination; and a central control platform communicating with the user terminal ends via an internet to enable the user terminal ends to upload plural sets of motion data of the motion combinations, where the plural sets of motion data are stored in a memory unit, and one set of motion data corresponding to an aforementioned motion combination required by a user terminal end will be selected from the plural sets of motion data and sent to the user terminal end.