The environment of engine test is usually companied with strong vibration and intense noise. The laboratorial laser combustion diagnostic systems can not be directly used in the harsh environment of engine test. Through modularization and anti-vibrating engineering designs, an integrated mobile coherent anti-Stokes Raman scattering (CARS) system is developed, which can be used in the engine test. To analyze the sources and characteristics of vibrations, the vibrations in the engine test are measured. Some de-vibrating techniques are utilized accordingly, and vibrations on the mobile CARS system decrease effectively. Employing the mobile CARS system, single pulse CARS measurements and temperature evolution on a model supersonic engine combustor are obtained. According to the results, temperature range of unstable combustion is higher than that of stable combustion, but the mean temperature is lower, indicating that the efficiency of unstable combustion is lower.