In this paper a monitoring system that simplifies the finding of optimal welding parameters, the analysis and the optimisation of pulsed gas metal arc welding is described. The system allows the visual online observation of all states of the process, including the droplet transfer, without an additional lighting unit. Additionally, the measurement of electrical welding parameters during image recording and the extraction of characteristic parameters are possible. Furthermore, the system allows the visual analysis of the images. For an analysis and optimisation of the process the systems computes statistical data of all collected and calculated visual and electrical data.