The invention discloses a book recommendation system and book recommendation methods. The book recommendation system includes a graphic database module, an interface module and an output module connected in sequence by data flow. The graphic database module adopts Neo4j. The Neo4j is used for storing data source information used for book recommendation. The interface module is used for using the data source information in the Neo4j to calculate to-be-recommended book information through a data mining algorithm. The output module is used for outputting the to-be-recommended book information. According to the book recommendation system and the book recommendation methods provided by the invention, the Neo4j is adopted for storing data sources of the recommendation algorithm, and is, as compared with relational databases, capable of more quickly and more efficiently calculating the recommended book information, complexity of the algorithm can be effectively reduced on the basis of the data mining algorithm of the Neo4j, requirements for server resources can be reduced, and running efficiency of the data mining algorithm can be effectively improved.