Abstract: With the development of the spatial information technique, the technical measures and methods of the collection of the spatial information have changed thoroughly from the conventional ground-based, manual surveying, single point and single element to air-borne, automation, area range and full elements. The information data increase with the geometric series and its quality and property change greatly.At the same time, the spatial information technique is extending from the field of the conventional surveying and mapping to more broad fields. All these new developing techniques have much higher requirement of the development of the spatial information technique. The particular demand of the dynamic and real-time spatial information will promote the combination of the spatial information technique and the communication technique. We can prefigure that the spatial information technique will integrate closely with the communication technique in the coming 21st century and make the best use of the communication technique development to obtain the chance to develop fast. This tendency provides hard-won opportunity and challenge to the researchers of science and technology in the field of the spatial information technique. In this paper, the authors deeply discuss the integration modes and methods of the spatial information technique and the communication technique based on the analysis of the necessity and feasibility of their integration. The application fields and prospect are further expatiated through the analysis of some typical applications. Finally, the authors propose that the integration technique of the spatial information and communication should be the developing direction of the spatial information science in 21st century. Through such integration "Geo-Information for All" and Dig ital Earth to Every Family" will be realized for the development of human living quality.