This thesis presents the improvement of algorithm for antenna measurement software and development of measurement testbed for multi-input multi-output (MIMO) antenna measurement. Firstly, the algorithm for antenna measurement software is improved to operate with variety types of equipments and reduce measurement noise. After that, this software is used to measure 3 parameters of MIMO antennas. Finally, to measure other parameters of MIMO antennas and MIMO systems, the MIMO testbed is developed and presented. As the results, the improved software can be used to measure gain, 2D & 3D radiation pattern, for single antenna, and polarization, pattern diversity, polarization diversity and pattern correlation, for MIMO antenna. The measurement results are very beautiful when the noise filter algorithm is applied. In MIMO testbed design, direct conversion technique is used for analog front end circuit design. Front end circuits are also coupled with baseband DSP algorithm. The result is that front end circuits have compact size and wide bandwidth. Finally, hardware and software configurations of MIMO testbed are designed and presented.