At present in the construction industry, if can be directly observed objectively underground circular tens of meters deep perfusion pile foundation for cracks and other images is very meaningful for engineering personnel. Outdoor homework this topic with related industry demand, research and development of the corresponding equipment and related software, through the deep underground waterproof camera image transferred to the pile foundation caused by the laptop display screen, on the ground can be adjusted according to different pile diameter size automatically proportional scale, at the bottom of the screen on the right side and a ruler scale, can be viewed and through the scale measure wall crack size, marked location accurate depth at the same time. When a camera when you arrive at the bottom of the pile foundation can give, and to save the resulting image and other information compression for analysis.