12. The question and answer server according to claim 11 , further comprising a knowledge base, saving reasoning knowledge, and wherein the reasoning engine unit generates the natural language response according to the natural language understanding result, the language characteristics of the pet master, or the reasoning knowledge.
12. The question and answer server according to claim 11 , further comprising a knowledge base, saving reasoning knowledge, and wherein the reasoning engine unit generates the natural language response according to the natural language understanding result, the language characteristics of the pet master, or the reasoning knowledge. 14. The question and answer server according to claim 12 , wherein the reasoning engine unit obtains pet attributes or pet master attributes, and generates the natural language response according to the natural language understanding result, the reasoning knowledge stored in the knowledge base, the pet attributes, the pet master attributes, or the language characteristics in the pet master language information base.