The PulSaR DataBase (PSRDB, freely available at http://www.psrdb. net/), designed and implemented by the joint team from Guizhou Normal University (GZNU) and the Five-hundred-meter Aperture Spherical radio Telescope (FAST), is a highly dedicated, multipurpose and open-access database for the storage, visualization and comparative analysis of pulsar and its candidate data. Users can upload their candidate data through a unified user interface, and manage or share the data online. PSRDB encompasses records for more than 2811 known pulsars, gathered from pulsar literature and online database, published since 1967. PSRDB also includes new sources from major pulsar surveys, such as the Commensal Radio Astronomy FAST Survey (CRAFTS), which have not been officially published. In addition to its comprehensive database-derived, literature-derived data, PSRDB also supports a common text search function among the data and interactive visualization of the curated pulsar distributions with the most commonly used pulsar parameters and their uncertainties based on a web user interface. The PSRDB offers parameters and several comparative analysis methods, online real-time matching and retrieval of known pulsars, and multi-dimensional quantitative statistical analysis can be carried out in a predefined parameter space. Finally, results of the matching and comparative analysis can be visualized and displayed dynamically. The PSRDB can also provide candidate data management for individuals and institutes in the pulsar science community, and provide data support in new source confirmation observations, follow-up observation, new observation plan design and raw data processing, etc. Currently, PSRDB has been applied to the data processing and candidate management of FAST in FAST Early Science Data Center. PSRDB has been strenuously designed to address the broad demands of pulsar scientists, physicist, astrophysicist and members of the pulsar science community.