A management system includes a printing apparatus replaceably holding a first and a second replaceable item, and a management server. The printing apparatus includes a transmission unit that transmits identification data indicating identification information on the printing apparatus and data including a value related to a usage amount of the second replaceable item. The management server includes an acquisition unit that acquires a value related to a previous usage amount of the second replaceable item from a memory based on the identification data from the printing apparatus. The management server includes a determination unit that makes a determination about a delivery instruction of the first replaceable item based on the value related to the usage amount of the second replaceable item, which is transmitted from the printing apparatus, and the value related to the previous usage amount of the second replaceable item, which is acquired from the memory.