The study has designed and manufactured a controller for hybrid powertrain system with series-parallel configuration. The general model was manufactured completely including three main parts such as: a hybrid powertrain system, an information display panel, and a box of controllers. The electronic board was designed using Proteus Design software. An Arduino programming environment (IDE -Integrated Development Environment) was used to program the electronic controller for hybrid powertrain system. The system operated with eight working modes as: Charging BAT mode, Start mode, Normal driving mode, Low load mode, Full load mode, Deceleration mode at gearbox of D mode, Deceleration mode at gearbox of B mode, and Reverse mode. The experimental operation results showed that the model operated stably, and the controller could control the hybrid powertrain system effectively to achieve optimal management of the energy and power flow among internal combustion engine, electric motor, and battery in each working mode. The system model operated with working modes almost identically to the actual vehicle.