This page shows the various search forms briefly. For public, Guoshoujing Telescope (LAMOST) Pilot Survey data are distributed via the CAS(Databases), and you can search spectra by position, or by magnitudes and spectral parameters. The DAS(files) is a collection of fits images containing the outputs of the spectroscopic reduction pipelines, and you can search the calibrated fits files by their planID. The link explore enables you to find objects by their spectral classes. In addition, the catalogs list spectral parameters as ASSIC tables. For workgroup, the collaborators can access to the website http://data.lamost.org/pdr/ then login.