The invention relates to a greenhouse automatic control system based on agriculture Internet-of-Things, and relates to the field of agriculture Internet-of-Things. The system comprises an air temperature and humidity sensor, a soil moisture sensor, a carbon dioxide sensor, a light intensity sensor, a heating system, a ventilation system, an LED display system, an irrigation system, a light supplement system, an alarming system, and a host computer. The air temperature and humidity sensor, the carbon dioxide sensor and the light intensity sensor are connected to a host single-chip microcomputer. The soil moisture sensor is also connected to the host single-chip microcomputer through a signal amplification circuit. A host transmits signals to a slave computer through a wireless communication module. The slave computer is in control connection with the heating system, the ventilation system, the LED display system, the irrigation system, the light supplement system and the alarming system. According to the invention, remote parameters can be controlled wirelessly, great expansibility and practicality are exhibited, the labor intensity is reduced, and the production efficiency is improved.