King Rama the IV was known as The Father of Science of Thailand. He adopted his Western astronomy and geography knowledge from missionaries in Siam who arrived since 1833. It was a significant changed in scientific knowledge of Thailand but also effected Thai society on religious beliefs and decrease the faith in the King because these kind of knowledge are very new and turned the page of Thai history from fortuneteller dominated society into scientific society. It was hard at first because many people still stick on the old tradition that they always believed and these knowledge still circulated only in some class of the society (elite), most citizen have no idea what these things have any effect on their lives.