At present, initiatives toward carbon neutrality are required of every business entity all over the world. Mitsubishi Heavy Industries, Ltd. (MHI) has formulated initiatives from both aspects of CO2 emissions reduction and CO2 capture. In order to contribute to achieving our carbon neutrality goal through the utilization of digital technologies, MHI is developing solution menus for the intelligent solution TOMONI®, mainly in power generation. This report introduces our solutions for reducing CO2 emissions from gas turbine combined cycle (GTCC) and steam power (SP) plants and facilities to achieve carbon neutrality.