Abstract: ormulas for calculating albedo Yiew factors φ2, and infrared view factors φ3, of arbitrary concave surfaces and mutually visible surfaces have been devised, and on the basis of Monte Carlo Method, the factors of various surfaces such as hemispheric concave surface,parabolic concave surface, two mutually visible and vertical flat plates and outer cylinder surface on the bottom of which there is a flat plate, haye been calculated.The results shows albedo and infrared view factors of that kind of shapes can be calculated practically by using above method.