A lifetime management device includes: a cumulative-written-amount calculation unit configured to, each time data is written to a first storage device, calculate a cumulative written amount, the cumulative written amount being a sum of amounts of data written to the first storage device; a first information recording unit configured to associate the cumulative written amount with identification information of the first storage device and usage-start date and time of the first storage device into an associated set and record the associated set in a second storage device; and an end-of-life prediction unit configured to predict end-of-life date and time of the first storage device based on the cumulative written amount and the usage-start date and time recorded in the second storage device.