The invention relates to an Internet of Things (IOT) electric energy quality intelligent monitoring and treating system and belongs to the field of electric energy quality monitoring. The IOT electric energy quality intelligent monitoring and treating system comprises a user-side electric energy quality monitoring device, a data analysis main station, and an electric energy quality treating device (SVG). The user-side electric energy quality monitoring device acquires user-side electric energy quality data and uploads the user-side electric energy quality date to the data analysis main station in real time. The data analysis main station analyzes the electric energy quality data uploaded by each user-side electric energy quality monitoring device, computes an electric energy quality characteristic value, establishes a characteristic value cloud chart, determines a user-side range required to be treated according to the characteristic value cloud chart, searches a corresponding treating device, and sends instructions to each electric energy quality treating device, thereby achieving unified treatment of the electric energy quality within the range. The IOT electric energy quality intelligent monitoring and treating system may autonomously analyzes user electric energy quality data in a power grid in real time, performs area analysis on the power grid users, performs automatic treatment according to the electric energy quality cloud chart, and improves electric energy quality treatment efficiency.