According to an embodiment of the present invention, a device for estimating a
carbon dioxide reduction pathway may comprise one or more processors, and a storage medium for storing computer-readable instructions, wherein the computer-readable instructions are configured to, when executed by the one or more processors, cause the one or more processors to: receive basic information and an expected event for each of a unit capture facility, a unit utilization facility, and a unit storage facility for
carbon dioxide, the expected event including data regarding an operation rate of each predetermined period for each of the unit capture facility, the unit utilization facility, and the unit storage facility; generate a reduction pathway on the basis of the basic information and the expected event; construct
master data including the generated reduction pathway; and output the reduction pathway included in the
master data in a time-series manner, wherein the reduction pathway is a pathway formed by a combination of storage by the unit storage facility and utilization by the unit utilization facility with respect to
carbon dioxide captured in the unit capture facility.