A new nano-meter scale resolution optical imaging mode and functional prototype of photon scanning tunneling microscope (PSTM) combined with atomic force microscope (AFM) named as AF/PSTM are introduced, and the advantages of AF/PSTM are discussed. Two separated optical images (refractive index image and transmissivity image) and two AFM images (topography image and phase image) of sample can be obtained during AF/PSTM's once scanning. AF/PSTM is applicable to all transmission samples in many fields, such as nano-biology, medicine, nano-optics, nano-industry, nano-science and technology, high-education and so on.