With the increasing complexity of spacecraft functions and the improvement of software scale，there are many problems in the operating systems commonly used in the aerospace industry，e.g.，insufficient drivers and third-party library resources. Linux system has the characteristics such as stability，open source， and rich support，and has been widely used in high-reliability areas. Therefore，it is expected to meet the demands of complex applications to the aerospace industry. However，the amount of Linux system code is huge，and it is difficult to carry out aerospace software engineering and reliability assurance work. Based on the practical application of aerospace engineering，in this paper，an engineering method for Linux system software quality assurance is proposed according to the commercial and self-developed demands，which provides engineering ideas for the development of aerospace operating system related products.