1. A method for stabilizing a knowledge graph, the method comprising: generating the knowledge graph in which same entities in a semantic relation list of entities provided as an input are represented as a single node based on names and types of the entities; computing, on the knowledge graph, semantic similarities between available entity pairs of same entity types by comparing, for each available entity pair, a type of relation associated with a first entity in the entity pair and a type of relation associated with a second entity in the entity pair; selecting, based on the semantic similarities, a representative entity from each of semantically similar entity pairs on the knowledge graph and integrating an entity; that is not selected as the representative entity; into the representative entity; and computing relation weighted values between the entities by using a graph analysis and statistical information, and adding the relation weighted values to the knowledge graph.