Internationally，the building of the standardized spectral library in remote sensing has already

developed towards network share since 1990’s. As a reform and opening window in China, Guangdong province urgently

needs building up a standardized crop spectral library, especially in featured crops of South China, for stepping up

the agricultural information level. This research focused on the organization of spectral data and the construction

of a database system for featured crops of Guangdong province. The database is composed of five parts, i.e., the

knowledge database, the library for measured spectra, the remote sensing model database, the spectral analysis and

the application demonstration for the litchi orchard. In the spectral analysis, the authors designed and provided

the query of spectral data, the uploading of remote sensing images, and the analysis and simulation of spectral

data. The spectra-based planting area monitoring demonstration of the litchi orchard is presented so that the users

can utilize the spectral library conveniently.