The disclosure relates to a method and device for knowledge base construction, wherein the method for knowledge base construction comprising: retrieving (S101) text corpuses, and determining whether the text corpuses include first information according to a predefined property description pattern, wherein the first information includes property information of entities in a predefined entity set; and extracting (S102) first information, if the first information is determined to be included in the text corpuses, and constructing the knowledge base based on the first information and an entity corresponding to the first information. Embodiments of the disclosure save manpower and improve the speed of knowledge base construction, by knowledge mining without manual work during the knowledge base construction.