The volume measurement system based on the unmanned aerial vehicle (UAV) platform designed in this paper is to solve the problems of long measuring period, low accuracy and high cost in the process of material volume measurement. The system mainly consists of an unmanned aerial vehicle (UAV), a laser scanner, an inertial measurement unit, a differential positioning system, a wireless transmission equipment and a microcontroller. The UAV performs measurement tasks in a specified measurement area with the planned routes, the measured data will be returned to the ground station system to calculate the 3D coordinates of each measured point and build the stack model based on triangular or grid modeling method. Finally, the ground station system calculates the volume and produce three-dimensional map of the measured stock. The characteristics of the system are strong adaptability to environment, short measurement period and high accuracy.