A simulation cabin has been developed to solve the problem that there is no unif orm test environment an d calibration standard for visibility meters of different principle.Visibility from 10m to 50km is simulated by atomizers and purifiers.A method has been put forward,which can eliminate the error caused by air unevenness.A new transmission system is d eveloped for visibility measurement.Integrating sphere plays an important role in monitoring and receiving light,which can elim inate the error caused by the instability of light source.Adjusting optical path becomes easy by application of telescope.The LED light source in this system is modulated by external high frequency pulse signal and demodulated in receiver,which will eff ectively detach the interference by stray light.The collimation lens and beam expanding lens make divergence angle in 1mrad.The high reflection mirrors increase the optical path in the limited space,which also shorten the baseline of transmission system.Compa rison experiment was made with nephelometer. The result shows that the relative deviation between two systems was less than 5% from the 1.7km to 20km.Compared with the forward scattering visibility meter,the error is about 10%.After a calibration ,the error is reduced to about 5%.The control system of the simulation cabin is reasonable,and the transmission measurement system i s stable.