The invention discloses an apparatus and a method for measuring the latitude and the longitude of a track coordinate point. The measurement apparatus comprises: a positioning system for detecting andrecording the latitude and longitude coordinates and the kilometer post positions of a first position of a train stopping close to a target point and a second position of the train just passing through the target point; a range finding device for measuring a first horizontal distance L between an antenna and the coupler of the train and a second horizontal distance a from the coupler to the targetpoint when the train stops at the first position close to the target point; and a processor for calculating a walking distance b between the first position and the second position according to the kilometer post positions of the first position and the second position and determining the latitude and longitude coordinates of the target point on a track according to the kilometer post positions ofthe first position and the second position, the walking distance b, the first horizontal distance L, the second horizontal distance a and a position proportional relationship.