There are numerous and scattered fault signals in the HVDC transmission system, making it difficult to visually view the fault process and key information. There is also an inability to display important protection events outside the waveform file without marking the critical change time in the waveform. In response to these problems, a control signal serialization technology based on state grouping and an intelligent loading technology for waveform event labels based on force guided algorithm are proposed. First, using the serialization technology of HVDC control and protection signals based on state grouping, the most important HVDC control and protection signals are extracted. The system state is determined based on the signal changes, and the signals are grouped and summarized according to the system state. The changes in the primary and secondary equipment of the system during the HVDC fault process are presented in a visual action sequence diagram. At the same time, waveform event label intelligent loading technology based on force guided algorithm is used to display the switch displacement and protection event information as graphical labels. The fault analysis process based on waveform recording and related events is visualized and concisely displayed on the relevant waveform channel curve using the method of synchronous labeling on the time axis. Finally, the proposed technical solution is applied in practical engineering sites such as the National Dispatch Center, Zhejiang Dispatch, Jiangsu Dispatch, and Southern Power Grid General Dispatch. The results show that the proposed technical solution is convenient for scheduling, operation, and protection professionals to quickly understand the fault situation, improving the efficiency of HVDC fault handling.