In service, "attitude" is a service factor, which is valuable in itself and will also bring benefits. Smile is an important part of service attitude and the embodiment of positive attitude, which has attracted the attention of service industry. Smiling, as a silent service, can induce positive emotions for guests. The expression of emotional communication in service is also a manifestation of service. Smiling can convey the friendly, harmonious, harmonious, respectful and confident image and atmosphere to the guests, laying a good foundation for successful service. Smile is a special language-"emotional language". Can cooperate with spoken language and movements, play a complementary role, communicate people's hearts, build a bridge of friendship, and give people a good enjoyment. ......