In China, the Mid-Autumn Festival is an important festival second only to the Spring Festival. This is because people recognize the importance of the festival in the development of farming culture. Therefore, the custom of spring festival and moon festival has long been known. To the Mid-Autumn Equinox ", so after the 1st century AD, it went from sacrifice to the moon and worshiping the moon to admire the moon, but it was not fixed on which day. The Mid-Autumn Festival took shape in the 8th century, and August 15 was in the middle of autumn, so it was called Mid-Autumn Festival. At this time, when the sweet-scented osmanthus is fragrance, people face the sweet-scented osmanthus, and associate it with the moon, and then they add the custom of laurel appreciation in addition to the moon worship. At the latest in the 9th century, the Mid-autumn custom of eating moon cakes has been appear. The text is intended to explain:. ['Mid-autumn festival formation process.', 'Why the ancients valued the Mid-Autumn Festival.', 'What are the customs of the Mid-Autumn Festival?', 'Impact of farming culture on Mid-Autumn Festival customs.']