Abstract: Disclosed is a multifunctional intelligent breeding and rearing system. Functional modules such as a radio-frequency ear tag and identification device, a central controller (1), an isolation and dislodging device (2), a multifunctional feeding trough (3), an automatic feeding device (4), a quantitative water supply device, a feeding trough automatic flushing and a remaining feed detection are utilized to form a basic automatic feeding unit. Through the feeding unit, an identity and eating information of a pig is identified; for a pig that does not eat during a feeding time period, feed and water are injected into a feeding trough simultaneously according to a feed amount and a mixing ratio preset by the system, for precise feeding; a pig that has eaten up is dislodged in real time; and the feeding trough is automatically flushed at an end of feeding. The system realizes automatic and intelligent feeding of a livestock.