This study aims to review the concepts and theoretical basis of Land Suitability Assessment(LSA) for managing national land both efficiently and equitably. In looking at the historical development of LSA, the root of LSA can be found in the land type classification system in 1920s. Its technique has developed from containing physical characteristics into assessing land's socio-economic-ecological ones.
LSA is to assess land according to its physical, locational, economical, and environmental characteristics, and then to classify it into several categories based on its usability. Now, it becomes an important tool for making land use planning, one of whose purpose is to minimize the negative externality in land use activity. In addition, the importance of LSA is gaining new recognition as the information base for ecological land use planning.