Starting from calculating the directivity pattern of bar-shaped gravitational wave antenna, the relation of position between gravitational waves detectors and source is discussed in this paper. Further, the methods, which is used to determine the position of gravitational wave source, based on the data of coincident experiments, and the position of continuous gravitational wave source, based on the data of single gravitational wave antenna, are obtained. These results are also applicable for other types of one-dimentional gravitational wave detector. Once the sensitivity of the gravitational wave detector reaches the level, enough to determine the intensity of gravitational wave, the results presented in this paper will undoubtedly be useful for gravitational wave astronomy in the future.