Among all the great scientific advances of the 20th century, exploration of the outer space has been the most spectacular and significant. In the present era, satellite remote sensing and its application in various fields of science have benefitted the mankind to its optimum. The first satellite was launched in 1950s, since then it has recorded many changes and developments with the technological advancements. Today it is being used as a most important tool in communication, television and radio broadcasts, meteorology, agriculture, land use planning, education, disaster management, environmental monitoring and natural resource management. Satellite remote sensing has been effectively utilized in acquiring and analyzing valuable information about the earth resources. These are vital for development of a strong database for planning process and implementation of various programmes and projects at the national and state level. The present paper tries to introduce with the basic principles of remote sensing and application of remote sensing techniques in various fields.