Macronix building raft-coil-type ice storage system was used in 102. The cold storage capacity is the component ice storage. The on-site air conditioning supply mode is divided into two types: main engine priority and ice melting priority. The main engine priority is based on the ice storage tank. Auxiliary, shorten the cooling time of the ice water host, provide users with a fast and comfortable source of air conditioning, and reduce the burden of the ice water host, so that it can reduce load operation and reduce electricity consumption during this period. The other mode is ice melting priority, which is on-site When the air conditioner is not used very much or on holidays, the ice water main unit is only used for daytime use by storing ice at night. When the ice storage capacity is low, starting the ice water main unit can also greatly reduce the power consumption during the day; the ice storage system is except for convenience , It is also a big point for saving electricity bills. Taking the three-stage electricity price in summer, the difference in electricity bills between day and night is up to 3.4 times. In addition to the original electricity bill gap, apply to the Taiwan Electric Power Company for a "cold storage air conditioning system." "Preferential electricity price for peak electricity consumption". After the off-peak hour electricity fee is calculated by a 40% discount, the difference between day and night electricity charges can reach up to 5.7 times. Proper use and distribution of air-conditioning can achieve the goal of saving electricity bills.