Foundry sand reserving method and foundry sand reserving system

A foundry sand reserving system comprising:

• at least one reserving unit configured to reserve foundry sand capable of being supplied to a foundry sand related device;
• and
• a control device configured to control at least one selected from the group consisting of a charge amount of the foundry sand to the at least one reserving unit and a supply amount of the foundry sand to the foundry sand related device, wherein
• the control device includes
• an acquisition unit configured to acquire a reserve amount of the foundry sand in the at least one reserving unit, the charge amount, and the supply amount,
• a setting unit configured to set a threshold for the reserve amount based on a predetermined aging time of the foundry sand, and the charge amount and the supply amount acquired by the acquisition unit, and
• a control unit configured to control at least one selected from the group consisting of the charge amount and the supply amount based on the reserve amount acquired by the acquisition unit and the threshold.