The original application environment of PCTRAN for Kuo-Sheng nuclear power plant is a stand-alone operation. Therefore, only the local operator of PCTRAN workstation can run simulations and access the simulation results. This research expanded the application environment from stand-alone to multi-operation through Internet. The features of this expansion include (1) using MySQL database so that the initial conditions can be shared by other operators, (2) the simulation results are stored in MySQL database which can be read through webpage, (3) the simulation can be remotely performed using VNC, and (4) the webpage is developed using Tomcat web server so that the PCTRAN simulation results can be shown. Finally, the success of the developed program is demonstrated by two simulations.