Smartcontainer monitor device JT705, is a kind of device used for ISO container,refeer container, van truck application. It has the function real timetracking, unsealing by online or near field offline, detecting aroundenvironment of cargo, monitoring the lock posture, like: if the door positionor the inner temperature is changed, the system can send alerts. It can detectthe behavior of door dismouting, cargo leaving container, and can control theillegal door dismounting and cargo theft problem.