The application relates to a road construction process online monitoring system, method and electronic equipment, and belongs to the technical field of road construction process monitoring and management. The system comprises a data acquisition end, a data management and analysis end and a supervision terminal. The data acquisition end is used for collecting construction physical parameters and three-dimensional space information of a road construction site through a field detection device, and constructing a BIM three-dimensional simulation model based on the three-dimensional space information. The data management and analysis end is used for preprocessing the construction physical parameters, and monitoring different construction procedures in the road construction process through multiple monitoring subsystems and the preprocessed parameters to generate index data. The supervision terminal is used for displaying the BIM three-dimensional simulation model. The construction physical parameters and the index data are contained in the BIM three-dimensional simulation model. The road construction process online monitoring system provided by the application improves the field construction quality and the data utilization rate in the construction process, and realizes visual monitoring of a road slope construction site.