An embodiment of the invention discloses a body surface location method. The body surface location method includes that a first image collector acquires a test point of the body surface; a first bed size is acquired, to be specific, the first bed size is s horizontal bed size corresponding to an intersection point of the upper surface, of a current bed, and a connecting line, of the first image collector and the test point of the body surface; a second image collector measures the vertical distance from the test point of the body surface to the upper surface of the bed; a second bed size is determined according to the first bed size; the vertical distance and a first inclined angle, to be specific, the second bed size is the horizontal bed size of the test point of the body surface, and the first inclined angle is between the connecting line, of the first image collector and the test point of the body surface, and a straight line, formed by projecting the connecting line to the upper surface of the bed; the test point of the body surface is located by the second bed size. An embodiment of the invention further discloses a body surface location system. By the use of the body surface location method and system, X-ray radiation which is caused by human body surface location and which brings damages to patients is avoided, health of the patients is improved, and X-ray dosage is reduced.