Motion information measuring device, method and system

The invention provides a motion information measuring device, method and system, and relates to the field of motion information measuring devices. According to the motion information measuring device, method and system, a wearable device capable of being worn on the human body is used for collecting three-axis acceleration for representing the wearable device in three axes of a three-dimensional system of coordinates, and sending the collected three-axis acceleration to the motion information monitoring device, the motion information measuring device starts timing and obtains timing moment information after receiving the three-axis acceleration, and motion information is worked out according to the timing moment information and the acceleration. By means of the motion information measuring device, method and system, various kinds of motion information (such as jumping height and horizontal plane motion speed) of the human body can be measured during sporting, a sporter can do physical exercise regularly or in a targeted mode according to the measured motion information, and interests and sustainability of the sporter for physical exercise can be motivated.