Abstract: In order to form an optical fiber probe, the optical fiber probe profilemeter uses a singular single_mode optical fiber as the detector for transmitting and receiving light. This optical fiber probe can be used to measure the profiles and roughness of the measured surface were. In this paper, the shape and size are calculated and analyzed, the principles of measuring profile and roughness of the measured surface discussed, the construction and operating principle of the optical fiber probe profilemeter detailed. In the end, the measurement results are presented.