The invention relates to a fast orientation system, which is formed by gyroscope used to ascertain north direction, and automatic following electric instrument used to measure trilinear coordinates. It id formed by automatic gyroscope 3, automatic following electric instrument 1, screw coupling device 2, timing signal channel 4, palmtop 5, power controller 6, GPS RTK receiver 8, GPS base station 9 and fast orientation measuring control software 10. It is suit for subway shield driving, channel piercing, remote weapon fast orientating, city cadastral measuring, craft cabin measuring and mine emergency orientating and so on.