1. A device for executing a hybrid web application written in a web standard language including a system application programming interface (API) call, the device comprising: a web user interface layer that requests a process according to the system API call from a hybrid web application interface layer, and performs a process according to the web standard language; a hybrid web application interface layer that requests the process corresponding to the system API call from a cross platform system service interface layer in response to the request of the web user interface layer, synchronously or asynchronously receives a result of the process corresponding to the system API call from the cross platform system service interface layer, and transmits the received result to the web user interface layer; and a cross platform system service interface layer that performs a platform dependent operation corresponding to the system API based on the request of the hybrid web application interface layer.