The invention discloses a CFB boiler system capable of combusting waste gas and waste liquid in a blending manner. The CFB boiler system comprises a CFB boiler chamber, a boiler tail flue and a separator, wherein first combustors are respectively arranged on two side walls of a dense phase region of the CFB boiler chamber, second combustors are respectively arranged in secondary air nozzle regionson the front wall and rear wall of the CFB boiler chamber, and a third combustor is arranged at the top of the boiler; a flue gas outlet of the CFB boiler chamber communicates with an inlet of the separator; a flue gas outlet of the separator communicates with the boiler tail flue; an outlet in the bottom of the separator communicates with an inlet of a material returning machine; an outlet of the material returning machine communicates with an inlet of the CFB boiler chamber; and a wind distributing device is arranged at the bottom of the CFB boiler chamber. Through the adoption of the CFB boiler system disclosed by the invention, elimination treatment of the waste gas and the waste liquid can be better realized.