This paper presents a design support method to establish an eco-design concept of a product and its life cycle by assigning appropriate life cycle options to the components of the product. The product life cycle planning (LCP) method consists of the following four steps. The first is the specification process, in which target values of product and its life cycle are set. The second is the concept evaluation at product level, which selects a basic eco-design concept. The third is the solution generation process, in which solution ideas at component level are generated by using various analysis charts such as upgradability, maintainability, reusability and recyclability analysis chart. In the last step, eco-design concepts at component level, which consist of eco-design solutions, are evaluated. In the LCP method, environmental aspect is integrated into quality and cost aspects systematically. The design support tool was made for efficiently planning a product life cycle by using QFD and LCA data. A case study verifies that the proposed method and the tool are useful for developing an environmentally conscious product.