The effect of virtual photon field in the Kerr like medium on the photon statistical evolution of one excited three level atom was investigated. The results show that the quantum noise of the photon statistical evolution is caused by the virtual photon field, the quantum noise becomes weak gradually while ω increases, and disappears while ω approaches threshold. The amplitude of Rabi oscillation increases and the frequency becomes higher while λ increases, and the quantum noise simultaneously becomes strong. On the other hand, the amplitude decreases and the frequency becomes slower while μ increases, and the quantum noise simultaneously becomes weak.