Technology readiness level is an assessment tool for technology risk control, widely used in large-scale complex engineering such as military and aerospace industries. High purity metal targets are one of the key materials required for production in fields such as semiconductors, flat panel displays, and solar cells. The technology and process are very complex, which determines the level of technological maturity and will have a significant impact on downstream applications. This article combines the needs of downstream users and establishes a technology maturity evaluation model for high-purity metal targets with "parameters-indicators-data" as the core. It develops a technology maturity evaluation method suitable for high-purity metal targets and uses high-purity cobalt targets as an example for evaluation and application practice. It diagnoses the problems existing in the industrialization process, proposes improvement suggestions, and helps target production enterprises continuously improve and enhance.