"Internet Plus" represents a new form of society that provides vast platforms of reform, innovation, and development. With the gradually deepening integration of the Internet and traditional industries, the "Internet Plus" has prompted profound transformation and has generated obvious influence on many traditional industries, such as manufacturing, agriculture, finance, education, and logistics. In the big data era, the instrumental acquisition of geo-information expands from professional air-space-ground sensors, such as satellites, airplanes,and UAVs, to billions of non-dedicated sensors connected to the Internet of things. Ubiquitous geospatial data sensors with communication,navigation, positioning, photo/video imaging, and broadband data transmission functions are in development. Furthermore, millions of video cameras in cities can continuously provide images with PB and EB data size. These ubiquitous sensors can greatly enhance the data acquisition ability of geomatics. The application of geomatics is becoming increasingly pervasive, expanding from expert users to global public users. However, given the volume, velocity, variety, and veracity of data, effectively extracting useful information from big data is difficult,thus resulting in situations of "massive data, missing information, and unavailable knowledge".The ultimate goal of geo-spatial information services is to deliver the right data, information, or knowledge to the right person in the right place at the right time. To provide global all-time, all-weather services to everyone, we should overcome the defects of existing geospatial information service systems, such as limitations of coverage area, slow response, and weaknesses of systematic interoperability.Therefore, we propose an "Internet Plus" space-based information service coupled with ground networks. In line with the principles of "one satellite with multiple functions, multi-satellite networking, and multiple network cooperation", a proposal for an integrated space-based information service system is presented. This space-based network with remote sensing, navigation, and communication functions can be seamlessly integrated with existing ground Internet and mobile networks. With the support of spatial-temporal big data, cloud computing,and intelligent terminals for space-based information services, all sectors of the national economy, industries, and the vast majority of public users will be provided with rapid, accurate, and intelligent positioning, navigation, timing, remote sensing, and communication services in real time. Considering the development condition of aerospace and information technologies, we describe a trilogy of an "Internet Plus"space-based information service system construction: web GIS in the primary stage, sensor web GIS in the intermediate stage, and smart sensor web GIS in the advanced stage. The key characteristics of the three stages are emphasized. Finally, the development prospects of the"Internet Plus" space-based information service system and its key technologies are discussed.

Internet Plus;space-based information service;space information network;earth observation brain