1. A method of searching information using web, comprising: generating a basic word vector about at least one of a provided user query and a linguistic analysis result, and searching a vector space corresponding to the basic word vector in a vector space database using the at least one basic word vector; determining a degree of similarity between the basic word vector and the searched vector space; generating an expanded word vector based on a web search result performed using at least one of the provided user query and the linguistic analysis result, and searching a vector space corresponding to the expanded word vector in the vector space database using the expanded word vector, when the degree of similarity is equal to or less than a threshold value; and searching knowledge information based on the searched vector spaces in the basic search step or in the expanded search step.
1. A method of searching information using web, comprising: generating a basic word vector about at least one of a provided user query and a linguistic analysis result, and searching a vector space corresponding to the basic word vector in a vector space database using the at least one basic word vector; determining a degree of similarity between the basic word vector and the searched vector space; generating an expanded word vector based on a web search result performed using at least one of the provided user query and the linguistic analysis result, and searching a vector space corresponding to the expanded word vector in the vector space database using the expanded word vector, when the degree of similarity is equal to or less than a threshold value; and searching knowledge information based on the searched vector spaces in the basic search step or in the expanded search step. 3. The method of claim 1 , wherein the vector space database further comprises a basic vector space database in which vector spaces are formed with the knowledge information and an expanded vector space database in which vector spaces are formed based on the web search result performed using the knowledge information.