Thai classical music was the valuable national cultural heritage that reflects to Thai traditional, show the wisdom of the Thai ancestors that have exquisitely and delicately. Forms of music composition are according to the structure of the sound system, use the regulation several formats to play, author lyrics with the refined verses and gentle singing. Therefore, Thai classical music has a role that relate with the lifestyle of Thai people always, mainly in the form of the rituals associated with religion and entertainment. National Artist Khru Phinit Chaisuwan discusses the relationship of Thai classical music with culture and tradition in the book “84 years the professor who the venerable person national Artist Khru Phinit Chaisuwan” that Thai people have relationship with the tradition activities, like to employ Pee – phat to play in their religious ceremony. When Pee – phat play Hom Rong Yen song, the songs that use to play after the monks chant. That song will be created an atmosphere in their ceremony to joy in mind.