由於近年來全球氣候異常，各國也越來越重視環保永續等問題，其中全球暖化的議題也備受重視，而其多是由溫室氣體大幅增加所導致，這也是近年碳足跡議題被廣泛討論之主因，此外在各國法規的推動之下，針對產品的碳足跡評估的需求劇增。然而產品另一個環境重要指標水足跡，水是生物不可或缺的物質之一，因為氣候變遷，許多地方水資源越來越缺乏。以商業的角度來看，如果產品生產線對水的依賴程度越高，遇到缺水危機時產能勢必大受影響，因此許多企業也針對水提高水資源的回收率及利用率，降低對水的依賴程度，減少環境衝擊。
依照產品碳足跡及水足跡評定的標準，需要對產品進行生命週期評估分析，並測量生產及使用產品過程的排放與消耗。但直接排放數據往往難以取得，因此須輔以生命週期評估軟體和資料庫內的資料，而目前資料庫尚未建立完整，進而提升評估困難度。
本研究針對自動化設備的關鍵性零組件「線性滑軌」進行生命週期評估，選定標準型A型的線性滑軌系統作為案例，利用此線性滑軌作評估。透過Ecoinvent、SimaPro等資料庫及軟體進行分析。以利日後提供自動化設備在選用線性滑軌時，可依據滑軌長度及型號，直接獲得相關評估數據。

Carbon footprint and water footprint can be seen as the important environmental indicators of product, we can reach the concept of environmental protection and sustainable development. Linear guideway is one of the key parts of many machines. This research will discuss the carbon emission and water use of a linear guideway at all stage in life cycle. First, analysis various parts of linear guideway to calculate the carbon emission and water use in stage of raw material, manufacturing process and other stages. Collect data from life cycle database and literature to establish assessment procedures and methods for calculating the carbon footprint and water footprint of linear guideway. Finally, through the assessment phase results, establish conversion factor of the raw material and manufacturing process stage for linear guideway standard parts, in order to provide rapid assessment of linear guideway.

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