Abstract: Under the background of urban low-carbon transformation, a study on regionalization can provide a refe-rence for achieving optimization of territorial protection and high-quality development. We examined carbon emission and spatial differentiation characteristics of land use in 79 counties of Fujian Province. From the perspective of carbon neutral, reasonable division of region of Fujian Province was gotten after a comprehensive evaluation combined with economy contributive coefficient of carbon emission, ecological support coefficient of carbon absorption and priority function zoning. Then, we proposed the low-carbon optimization strategy for differentiated land space. The results showed that the total carbon emission in Fujian Province was 62.0416 million t and the total carbon absorption was 49.0971 million t in 2017, indicating that Fujian was at a state of carbon deficit. The spatial distribution of carbon emission and carbon absorption was opposite from coastal to inland. The six territorial space zones were low-carbon development-ecological function zone, low-carbon development-main producing area of agricultural products zone, low-carbon development-urban optimization zone, carbon sink function-main producing area of agricultural products zone, carbon intensity control-urban optimization zone, and high-carbon optimization-urban optimization zone. We proposed the corresponding low-carbon optimization strategies of territorial space for each zone.

Key words: carbon neutrality, territorial space, low carbon optimization, Fujian Province