In international or globalised trading, commodity trading does not only depend on the commodity, but also the role that companies have in commodity production and distribution. One step made by oil companies clearly determine the world oil prices associated with oil deposits (inventory) and drilling. The strategy they adopt in production will also be have strong effects on the world oil price trends. To observe the fluctuation of the world oil prices, an effort shall be made by estimating the world crude oil prices so that entrepreneurs can predict when the world oil prices fall or rise and determine policies in the production and use of oil. This study was to aplly method of the world crude oil price estimation, namely H-Infinity to determine the right decision the oil entrepreneurs shall make regarding the world crude oil. The simulation results showed that the application the H-Infinity method had an accuracy of around 97-98%.