Survey attitude parameters of the instrument in the gravitational field and geomagnetic field by triaxial accelerometer and triaxial magnetic sensor; Eliminate reading error made by human through adopting embedded system to process data; Obtain multi-group of data from each measurement point and automatic check for each group of data is available. It is widely applied to directional well drilling and vertical well survey in oil drilling and coal bed gas wells. Compared with photographic single shot survey tool, this instrument does not use develop solution, film and so on, which eliminates reading error and saves cost. It is the substitute of magnetic photographic survey tool.