This study aims to calculate the boundary layer height retrieved by ground-based micro-pulse lidar data, microwave radiometer data and lidar data (space-based) of corresponding space-borne CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) from the semi-arid climate observatory and laboratory of Lanzhou University (SACOL). Microwave radiometer data with parcel method, micro-pulse lidar backscatter data with curve fitting method and wavelet transform method (Haar wavelet transform method and Mexican Hat wavelet transform method), CALIPSO Level 1 scattering profile with maximum variance method and Mexican Hat wavelet transform method, and Level 2 aerosol layer product are used to calculate boundary layer height. When the wavelet transform method is used, the boundary layer height retrieved from CALIPSO Level 1 data is more sensitive to the initial value of wavelet amplitude than that from micro-pulse lidar data. For the retrieved boundary layer height, microwave radiometer data and micro-pulse lidar data are very close. The result shows apparent seasonal variation, and the boundary layer height reaches its maximum in summer. Which is the same as the retrieved result of CALIPSO Level 2 product. But the seasonal variation in boundary layer height retrieved by CALIPSO Level 1 data is not apparent.