The invention discloses an internet of things (IOT)-based visualization system for working conditions of electric forklifts. The system comprises a data obtaining module, a data preprocessing module,a data storing module, a chart drawing module and an interacting and displaying module. According to the system disclosed by the invention, the speed and the positions of the forklifts and the weightof transported goods are displayed in real time in a background dispatching center according to IOT data of operation states of the forklifts, which are transmitted to a server by a gateway; visual charts such as maps, columns, broken lines and the like of the use efficiency of the forklifts, the remaining amount of batteries, the speed change curves of the forklifts, the total traveling distancerecords and the like of every day, every week and every month are generated and displayed in real time by using the processed data; managers can master the working conditions of the forklifts in realtime and switch among different views according to the needs to comprehensively judge the working efficiency of the forklifts, predict and analyze the service life states of the forklifts and reasonably select allocating and scheduling schemes of tasks according to the workshop operation requirements; and therefore, finally, the service efficiency of the forklifts and the warehouse work efficiencyare improved and the service life of the forklifts is prolonged.