Abstract: A reception unit receives data including first software for updating a first component, which is one of a plurality of components, and second software that is software for updating a second component, which is another one of the plurality of components, and for realizing a function associated with the first software, from a server. A storage unit stores received first software and second software. An update unit updates the first component and the second component based on the first software and the second software after the first software and the second software are stored in the storage unit.

Abstract: A software update system according to the present disclosure updates software of a first component of a work machine. The software update system includes a reception unit that receives differential data for updating the first component, which is connected via an internal network of the work machine, via an external network; a software acquisition unit that acquires first software stored and executed by the first component from the first component; a software generation unit that generates second software by applying the differential data to the first software; and a software output unit that outputs the generated second software to the first component.