The resource consumption of a work vehicle at a specific work place is more appropriately estimated, and resource replenishment timing is appropriately calculated. A resource replenishment system for a work vehicle that performs work and travels at a work place while consuming resources supplied from an energy source pack mounted in the vehicle body is provided with: a consumption amount recording unit 62 for recording the actual unit consumption amount of resources together with work content as a work history; a work plan management unit 52 for managing work plan information that includes the work content; an estimated consumption amount calculation unit 101 for calculating, referring to the work history, the estimated unit consumption amount of resources consumed per unit work amount of the work vehicle that is carried out on the basis of the work plan information; and a replenishment management unit 60 for calculating replenishment timing with which the energy source pack is replenished with resources on the basis of the estimated unit consumption amount.