Comparing and analyzing the existing stratospheric airships, a joint-type stratospheric airship with a conventional streamlined lift boat and intermediate wing is proposed. The concept, key components and digital model are designed. Through aerodynamic feasibility and parameter sensitivity analyzing, the feasibility of the preliminary scheme is proposed. The airship can maintain long-term life in the vicinity of the space, enabling remote reconnaissance, intelligence detection, land survey, disaster acquisition, and communication. The low cost and other advantages have reference value for future spacecraft design.