In order to make the measuring device quickly work and to reduce the measuring error from inclination, a scheme of real-time compensative leveling in the photoelectric measuring equipment was presented. On the basis of the optical theory, the relationships among the subject hight,subject distance,image hight and the image distance were deduced.Then, a mathematical model for real-time compensative leveling the object or the optics system was established using the incline characteristic. Based on the the mathematical model and the angles tested by an inclinometer, a real-time compensation scheme was carried out to level and compensate the inclining angle in a certain range.The scheme was verified by experiments,and the result shows that after real-time compensation the measurement precision is from -0.176 15％ to -0.077 87％ when the obliquities of measuring equipment is at α in optimized 0.26° and β in 1.197°.It is concluded that the scheme can keep the measurement precision of the measuring equipment when it works at an incline.