During the R D phase of wireless power transmission (WPT) product, it is necessary to measure and evaluate the changes of magnetic flux density (B), coupling coefficient (k) and efficiency (η) when the positions of transmit coils (TX) and receiving coils (RX) are shifted. The paper designed a set of automatic measurement system for three-dimensional scanning and positioning. The host computer can obtain the data of positions and magnetic coupling parameters by means of controlling the slave machine and the measuring equipment remotely. Host computer can stored data in Excel and called MATLAB script to draw 3D graphics of k, η or B in the spatial plane. The accuracy and reliability of the measurement method and system were verified by the comparison with the theoretical calculation of the multi-turns plane spiral hollow coil.