1. pepper quality: the quality of pepper is related to the drying method of pepper. The price of pepper drying room is not fixed, because each farmer's drying output is different, the equipment size is different, and the customer's demand is different, so the equipment configuration is different.

2. Supply and demand: The price of pepper will be affected by supply and demand. If the supply of peppers in the market exceeds demand, the price will fall; On the contrary, the price will go up.

3. Cost factor: The cost of pepper drying room includes equipment, energy and labor. If the cost is higher, the price of pepper will rise accordingly.