A modular vending machine system including: multiple cartridges configured to hold a good to be dispensed; a docking station configured to removably store at least one of the cartridges; a vending machine main body including a cartridge port configured to receive at least one of the cartridges, a dispensing-port for dispensing the good to a user, and a mechanism configured to perform at least one of removing the good from the cartridge, performing dispensing preparation processing of the good, or dispensing the good via the dispensing port; and control circuitry configured to control operation of the cartridges, the docking station, and the vending machine, wherein the cartridge is provided with a traveling mechanism configured to enable the cartridge to move to and from the docking station and the vending machine main body.