24. The server of claim 19 , wherein the knowledge base is to store the reasoning knowledge in question and answer pairs.
19. A question and answer (Q&A) server, comprising: a processor coupled to a memory storing instructions for execution by the processor; a sentence comprehension engine module, wherein when the instructions are executed by the processor the instructions cause the sentence comprehension engine module, to process a sentence in natural language received by the Q&A server through natural language comprehension, cause the QUA server to obtain language characteristics of a pet owner from a pet owner language information base according to an ID of the pet owner received by the Q&A server, and cause the Q&A server to send a result of natural language comprehension to a reasoning engine module; wherein the language characteristics of the pet owner include language tips and expression manners; the reasoning engine module, wherein when the instructions are executed by the processor the instructions cause the reasoning engine module to generate an answer in natural language based on the language characteristics of the pet owner, reasoning knowledge and the result of natural language comprehension; and a knowledge base, storing the reasoning knowledge.