The invention discloses a fruit-and-vegetable intelligent irrigation system based on the internet of things. The fruit-and-vegetable intelligent irrigation system comprises an environment detection module, a data collection terminal, an intelligent irrigation decision-making server and an irrigation control terminal, and the environment detection module, the data collection terminal, the intelligent irrigation decision-making server, and the irrigation control terminal are connected in sequence; the environment detection module comprises a soil temperature-and-humidity sensor, a light intensity detector and a rainfall detector; the data collection terminal comprises a first CPU (central processing unit), a first communication module, an AD module, a solar power source and a storage module, and the first communication module, the AD module, the solar power source and the storage module are connected with the first CPU separately; the intelligent irrigation decision-making server comprises an irrigation decision-making inference engine, a storage module, and a computing module, and the storage module and the computing module are connected with the irrigation decision-making inference engine; the irrigation control terminal comprises a second CPU, a control module, a second communication module and an AD module, and the control module, the second communication module and the AD module are connected with the second CPU through a PCI bus.