The image capturing system includes: a fixed image capturing unit fixedly installed at a predetermined position; a three-dimensional image information storage section for storing a three-dimensional image of the region including the fixed image capturing unit; an image comparison section for comparing a portable captured image captured by a portable image capturing section held by a user with the three-dimensional image stored by the three-dimensional image information storage unit; a position determination section for determining the position and the orientation of the user holding the portable image capturing section based on the comparison result by the image comparison section; and a guiding information presentation section for presenting information for guiding the user to set the user in the frame of a fixed captured image captured by the fixed image capturing unit. The guiding information presentation section transmits information for guiding the user to a portable unit having the portable image capturing section to cause the portable unit to output the information.