This research focuses on supportability engineering for complex equipment and systems. It is dedicated to constructing integrated supportability models that cover the entire lifecycle of design, operation, and maintenance. Through simulation and data analysis methods, it systematically evaluates key characteristics such as reliability, maintainability, testability, and supply support. The aim is to establish a scientific framework for support effectiveness evaluation and optimization, providing a theoretical basis and decision-support tools for enhancing system operational availability and reducing total lifecycle costs.