The invention discloses a big data based topic selection planning system. The big data based topic selection planning system includes a data acquisition unit for acquiring associated data of book topic selection planning; a data processing and storage unit for dividing the acquired data into a real-time service data source and a basic data source according to the data timeliness demand, storing the data in a hadoop based publishing house distributed database, and uploading the date into a data mart; an analysis prediction unit including a statistic analysis platform, wherein the statistic analysis platform can perform overall analysis and prediction on the data provided by the data mart, and can provide an important reference and basis for making and modifying of topic selection planning of a publishing house. The big data based topic selection planning system uses a big data analysis technique to help a book publishing mechanism to master book market purchase trend and market hot spots, can timely update the most suitable topic ranking, can accurately master the actual demands of a reader group, can position a specific consumer group, and can provide a scientific basis for improvement of topic selection planning ability of the book publishing mechanism.