本文简要地介绍了三“Ｓ”一体化信息技术产生的背景、概念、理论、方法，技术系统和特点以及在遥感对地观测技术领域里的地位。全球变化研究、资源环境动态监测、信息“高速公路”等对信息技术高时效性要求日益急迫的情况下，三“Ｓ”一体化信息技术必将成为重要的发展方向之一。 This article briefly introduces the background, concepts, theories, methods, technical systems and features of the three “S” integrated information technologies and their position in the field of remote sensing earth observation technology. With the increasingly urgent research on the high timeliness of information technology, such as global change research, dynamic monitoring of resources and environment, and information “expressway”, the integration of the three “S” information technologies will surely become one of the important development directions.