The invention discloses a portable farmland environment information remote acquisition and monitoring device, in particular to a remote real-time monitoring device based on an open Internet of Things platform. The device comprises sensors, a micro processing controller, a signal acquisition unit, a wireless router, a wireless network card, a network expansion board, a mobile power supply, a machine shell and the open Internet of Things platform. The micro processing controller, the wireless router and the network expansion board in the machine shell and the sensors outside the machine shell are powered through the mobile power supply. The micro processing controller in the machine shell is in communication with a PC through a USB communication interface, the signal acquisition unit is connected with the sensors outside the machine shell through acquisition interfaces, and the router is connected with the wireless network card through a USB interface. The device is portable, and can flexibly achieve farmland environment information acquisition and synchronously perform serial port acquisition and web publishing; and the device provides an open internet data platform for experts to perform analysis and decision-making, and solve the problem that data searching and analysis only can be performed on a single server.