Korea Aerospace Research Institute(KARI) has been developing a new launch vehicle Korea Space Launch Vehicle-Ⅱ(KSLV-Ⅱ) with their own technology. Thus, it is required a new launch complex that corresponds to a new propulsion system of launch vehicle. Because widely changing of KSLV-Ⅱ comparing with KSLV-Ⅰ such as thrust of engine system, composition of vehicle staging, pneumo-hydraulic scheme of propulsion system, it is important to establishing appropriate ground support equipments for fuel(kerosene) filling. In this critical design process, specific supply line and specification of components are designed and the concept of kerosene filling is determined based on results of preliminary design. Also, plans of supply operation and prerequisite are established and operation algorithms are formed.