Container technology is one of the fastest growing technologies. However, when it comes to the security of containers, it appears that their vulnerability has increased in line with its popularity. Because when users pulled images from various repositories for various need there can be images that can be harmful images to entire container environment. So, we need to verify security of those images before store them into container environments. In this paper, I describe a mechanism that can validate security level of container image before it pulled into the container. In addition, we use hash validation as well as Format String Validation for further check the image validity.