Wavelength measurement of frequency?stabilized lasers using optical frequency combs (OFC) is a necessary procedure to establish OFC?based wavelength standards. In order to establish the wavelength standard based on OFC and provide technical preparations for laser wavelength calibration, the wavelength of an acetylene?stabilized laser at 1542 nm was measured using a self?developed fiber OFC. By means of frequency beating between the reference laser generated by the OFC and the laser to be measured, the absolute frequency and vacuum wavelength of the acetylene?stabilized laser were obtained through simple algebraic relationship and were compared with the corresponding internationally recommended values. The measured vacuum wavelength of the acetylene?stabilized laser was 1542.38371235742 nm, within the uncertainty range given by CIPM. The stability was measured to be 4.13×10^-13 in 1 s. The wavelength measurement results of the acetylene?stabilized laser by two different OFCs were highly consistent, which further proved the accuracy of OFC?based wavelength measurement. This research is of great significance for conforming to the international development trend of length standards, and will accelerate the application of OFCs in the field of laser wavelength measurement.