The outline of Crustal Movement Observing Network in China is briefly introducted and its important applying prospects for study of Earth science are described.Its main contributions to Earth science are:①To play an important role in monitoring crustal movements in China continent and to provide quantitative data for earthquake prediction;②To provide important basic data for studying geodynamics;③Establishing ITRF,monioring Earth rotation,polar motion and natation;④Optimizing and densifing nation-wide geodetic network and geoid;⑤Offering a new way to study meteorology;⑥Providing a new method for researching ionosphere;⑦Giving high accuracy and near real time GPS orbit parameters;⑧Providing a base for wide area differential positioning.