Before entering the data centre distributed energy station, high-pressure natural gas needs to be depressurised by a throttling valve at a reduction station using internal combustion engines (ICEs). The decompression process not only wastes the pressure energy but also requires thermal energy consumption. Therefore, the authors propose two integrated systems, the distributed energy systems only with a natural-gas pressure energy system (NGPE/DES system) and the distributed energy system with a natural-gas pressure energy system and a CO2 capture system (NGPE/DES/CCS system), to recover the cooling and electricity in the data centre distributed energy system. The NGPE/DES/CCS system used the cooling and electricity generated by natural-gas pipeline pressure energy for capturing CO2 from the combustion of natural gas in internal combustion engines. The NGPE/DES/CCS system and NGPE/DES system were modelled and simulated based on the survey results. From the perspective of energy, exergy, exergoeconomic and environmental analysis, a comprehensive comparative study of two integrated systems was carried out. The SimaPro software was used to evaluate the environmental effects on the system from production to operation. The thermodynamic parameters of the two systems analysed with the same natural gas supply. The NGPE/DES system could provide 4705kW of power generation and 4080kW of cooling at a natural-gas flow rate of 771kg/h. Although the cooling capacity and power generation in the NGPE/DES/CCS system were smaller than those of the NGPE/DES system, it still met the needs of the distributed energy supply system, and 1858kg/h of liquid carbon dioxide with a purity of 99.9% could be captured in the system. The overall exergy efficiencies of the NGPE/DES/CCS system and NGPE/DES system were 49.51% and 47.43% respectively. The exergy cost of product in the NGPE/DES system was lower than that in the NGPE/DES/CCS system, but the value-added of its products was also relatively lower. The NGPE/DES/CCS system was significantly more beneficial to human health and ecosystem development than the NGPE/DES system.