Abstract: An optimization method, an optimization system for computer programming code and an electronic device using the same are provided. The optimization method includes the following steps. Several optimizers each having several branch paths are provided. A counter is set on each of the branch paths. When the optimizers run through the branch paths, the counters set on the branch paths, where the optimizer run through, are counted. The computer programming code is compiled through the optimizers. Several count values of the counters are obtained. The count values are collected to obtain a feature vector of the computer programming code. The feature vector is inputted to a machine learning model to obtain an optimizer collection suitable for the computer programming code.