The invention discloses a vertical search method based on user assistance. The method includes the steps that a system carries out general query on industry information, and a general query result is displayed; a user inputs a query keyword, the system carries out data processing, and the query range is narrowed down on the basis of the general query result; the system generates an extensible keyword list, the user selects an extensible keyword from the extensible keyword list, and the query range is further narrowed down. Correspondingly, the invention further discloses a vertical search system based on user assistance. The vertical search system based on user assistance comprises a base layer, a user data processing layer and a user interaction and system self-improvement layer. By applying the vertical search method and system based on user assistance to a certain field or industry, the working efficiency of professionals can be greatly improved; the vertical search method and system based on user assistance have the advantages that knowledge points are constantly increased, data information is latest, localization is fast, and extendibility is good.