The design scheme about the advanced distributed laser measuring and control system to the level of the oil tank is introduced.The level measuring theory based on the grating laser sensor with high accuracy and detonation-prevented is also presented.The courses of data collecting and signal processing are given.At the same time the sources of error are analyzed.The experimental results show that the signal is accuracy and no loss of code when it transmits 800 meters through the optical fiber,the system error is below 0.05 percent when the measuring level range is within 20 meters.