手機對於對於現代人來說，不論是男女老幼或在各行各業的人，幾乎可說是不可或缺的，而在硬體設備、通訊技術的大幅進步下，以及網際網路資訊的豐富性和相關軟體工具的便利性等種種許多原因的層層影響，刺激了消費者對「智慧型手機」(Smart Phone) 產品的需求，此也使得手機的用途已經有別於以往僅僅是通話或是簡易的行動祕書功能，現今消費者所渴望的是能在非固定的處所，滿足其對訊息接送、影音娛樂、資訊查詢等眾多功能的智慧型手機。
由於消費者對於智慧型手機的使用習慣及期待，已經有別於以往對功能型手機的需求，再加上智慧型手機市場的篷勃發展，智慧型手機取代傳統功能型手機的市佔率可謂是指日可待，因此不論是手機相關設備的廠商或是專司於智慧型手機的廠商，若希望要能在智慧型手機市場上佔有一席之地，便不能再以過去功能型手機的經營思維來面對智慧型手機產品的消費者，必須重新針對現今消費者對於智慧型手機購買時，所考量的關鍵因素作進一步了解，方能搶佔市場佔有率，進一步地達到獲利的目標。
本研究透過文獻的蒐集與整理，再將所整理的因素結果，針對消費者發放因素分析問卷，將問卷回收後，進一步的分析以建立消費者購買智慧型手機決策的關鍵因素層級架構；接著再透過層級分析法的問卷發放，來進一步了解消費者群體以及不同人口統計變數下，不同消費者對於所列關鍵因素的重要性比重及排序，從研究結果中可得知，價格與費用、功能兩大構面因素，乃是影響消費者購買智慧型手機決策中佔相當高比例權重的因素。

Nowadays,mobile phoneis indispensable to adults, children, and people in all walks of life. With hardware and communication technology changing, extensive internet information and convenience of software stimulate the consumer demand of "Smart phone".This reason makes the mobile phone has been different from the previousjust have such a simple function like communication, secretary function.Today's consumersdesire a smart phone with message, video and audio entertainment, information query and many other features.
Due to the consumers’habits and expectations of smart phone have been different from the past, vigorous growth insmart phone marketmake the smart phoneinstead oftraditional feature phone is just around the corner.No matter whatsmart phones and related equipment manufacturers who wish to stand in smart phone marketcan no longer use the same way to sell smart phone as traditional feature phone. Re-consider the key factors that consumerspurchasethe smart phone can get the market share and meet the profit goals.
This study collection and sortingthe literature, and then focus the results to doquestionnairesurveyaccording to the factor analysis. After questionnaires were recovered, further analysis the key factors that consumer buying smart phones and establishes the decision-making hierarchy.Follow by the questionnairesofAHP to understandthe importance of the key factors for thedifferentconsumer groups and demographic variables. The results from the study can be informed that the price and cost, and function two factors are the most influence consumer purchase decisions in smart phones.

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