A method for querying a product history is disclosed. The method includes receiving a product query request including at least one product query parameter for a target product to a product graph database that stores a relational map constructed based on a manufacturing process of the target product and describing entities including product entities and manufacturing entities and entity relations therebetween involved in the manufacturing process, querying the product graph database according to the product query parameter to obtain product history data of the target product by searching for a product entity corresponding to the target product as a target product entity in the relational map according to the parameter, searching for associated manufacturing entities of the target product entity according to the entity relations, obtaining the product history data based on the associated manufacturing entities, and sending a notification message to notify obtained product history data.