Abstract: Wetlands are one of the most important ecosystems on the Earth. Establishing a value accounting system for wetland resources and conducting wetland resources assessment are important links of wetland natural resources management. Based on the characteristics and management requirements of wetland natural resources assets, core indicators of wetland resource asset value accounting were selected, and an indicator system and evaluation methods were constructed. Moreover, taking the Erguna National Wetland Park as a study case, the value of wetland resource assets was evaluated. Three categories of functions were identified: supply services, regulation services, and cultural services, encompassing 14 primary indicators including food production, raw material production, water supply, flood regulation, groundwater replenishment, soil retention, wave reduction and shore protection, water purification, carbon fixing and oxygen release, climate regulation, air purification, species conservation, recreation and therapy, and science popularization education, with the further determination of 20 secondary indicators were established. The results show that the total value of wetland natural resource assets in Erguna in 2022 was 9.561 0 billion yuan, with an average value per unit area of 0. 934 8 million yuan/hm². Among the three services, the regulation service value (9 551.608 9 million yuan) was the highest, followed by the culture service value (5.306 4 million yuan), and the supply service value (4.482 5 million yuan) was the lowest. Within the total value of regulation services, the value of climate regulation function was the largest (7 267.425 6 million yuan), mainly derived from the humidity increasing function (6 599.863 5 million yuan). The Erguna Wetland plays a significant role in regional climate regulation and biodiversity conservation. This study lays the foundation for establishing a wetland resource asset accounting and evaluation system, preparing a natural resource balance sheet, and conducting ownership agency. Within the total value of culture services, the value of recreation therapy service (4.681 3 million yuan) was greater than the value of environmental education function (0.625 1 million yuan). Ecological water use (3.948 6 million yuan) was the most valuable function in supply services. The Erguna Wetland plays a significant role in regional climate regulation and biodiversity protection. This study lays the foundation for establishing a wetland resource asset accounting evaluation system, compiling natural resource asset liability tables, and conducting ownership entrusted agency.