近幾年，青少年在國內圖書館逐漸受到重視，臺灣許多公共圖書館分別成立規劃出青少年空間，有的是圖書館新建立的，有的是重新整建後的。由於臺灣公共圖書館目前尚未有針對圖書館規劃的青少年空間設計指南，因此本研究將從美國青少年圖書館服務學會出版的〈國家青少年空間指南〉作為公共圖書館在規劃青少年空間的參考依據。希望能了解青少年使用專屬空間的需求與滿意度，規劃出我國青少年空間設計指南，除了提供公共圖書館未來在規劃青少年專屬空間時的參考依據，也能讓圖書館更加重視青少年族群之需求，規劃出更為完善的服務，提高青少年對公共圖書館青少年空間的滿意度，吸引更多潛在的青少年使用者利用圖書館。本研究之研究目的為：（1）探討青少年需求與圖書館青少年空間設計原則；（2）探討青少年對圖書館專屬空間之使用情形與滿意度；（3）探討青少年使用圖書館專屬空間的滿意度影響因素；（4）探討青少年空間改造後的成效。 本研究透過深度訪談及問卷調查探討青少年利用公共圖書館專屬空間之需求與情形，以及其對專屬空間之滿意度與影響因素，建構出四構面28項指標，作為公共圖書館未來在規劃與評估青少年專屬空間時的參考。本研究提出之研究結論如下：（1）最多青少年閱讀的課外讀物類型為小說、漫畫與期刊/雜誌；最多青少年喜愛的資訊主題為休閒娛樂、流行文化與旅遊；（2）青少年每月平均閱讀課外讀物的數量以1-2本最多；平均閱讀時間以1-2小時為主；最多人閱讀課外讀物原因為個人興趣、打發時間、休閒娛樂；（3）青少年使用圖書館的頻率以每週一次最多；使用圖書館青少年空間的頻率以每月至少一次最多；使用青少年空間的原因多為讀書自修或準備考試、閱讀與借閱書籍、環境舒適；（4）青少年最常使用的書籍主題以小說、漫畫、文學/散文為主；最常使用設施與服務為閱讀桌椅與沙發；（5）四館青少年認為青少年空間最重要的服務前五名為滿足我安靜閱讀學習、光線照明充足、安全的場所、乾淨舒適、書籍陳列方式讓我容易找到、書籍種類及數量滿足我的需求；（6）分析四館青少年最滿意的服務項目前五名，發現四館青少年皆滿意青少年為安全的場所、及時找到館員協助；四館青少年皆不滿意青少年空間提供的娛樂項目與飲食需求，以及進行藝術創作；（7）透過四象限圖分析，四館使用者皆迫切需要改善的項目為書籍陳列方式讓我容易找到；（8）28項指標中，尤其在青少年空間的規劃與設計，國中皆較高中（職）認為重要；國資圖使用者特別在青少年空間滿足我飲食需求較其他三館認為重要；（9）級別與館別是影響青少年空間使用滿意度的因素之一；（10）與2012年朱懿幰以及2013強美玟的研究比較，整體來看發現青少年仍希望青少年空間能滿足其在安靜閱讀學習與社交的需求。埔里鎮立圖書館青少年對於空調、閱讀桌椅、資訊查詢仍感到不滿意；（11）四館青少年對圖書館空間改造後感到滿意。 針對本研究的結論，提出以下幾點建議：（1）四間圖書館皆應加強青少年空間的書籍陳列方式；（2）國立臺灣圖書館應重新審視青少年空間提供的環境動線與空間設計；（3）新北市青少年圖書館應加強改善青少年空間的隔音設備，確保能滿足不同使用者的需求；（4）國立公共資訊圖書館應加強青少年空間網路的穩定性；（5）埔里鎮立圖書館應加強青少年空間的空調溫度。 / In recent years, young adults are getting increasingly attention in Taiwan’s libraries. Many public libraries in Taiwan have set up space for young adults, some of which are newly established, and some are re-established. Because there are not space design guidelines about library arrangement for young adults in the public libraries in Taiwan, this research will be based on “The National Teen Space Guidelines,” published by Young Adult Library Services Association in America to arrange young adult spacein public libraries in Taiwan. This study hopes to understand the needs and satisfaction of young adults using young adult space, and to contribute to space design guidelines for young adults in Taiwan's libraries. In addition, this study hopes to provide reference of future arrangement of young adults’ space to public libraries, and to let libraries turn more attention to the needs of young people, and design more comprehensive services to gain young people's satisfaction and to attract more potential young people to use library. The main purposes of the research are as follows: (1) to investigate young adults’ needs and establish principles behind young adult space in libraries; (2) to inquire into satisfaction and circumstances of young adult readers using young adult space in libraries; (3) to investigate the influencing factors behind young adults’ satisfaction with young adult space in libraries; (4) to investigate the effect of the reformation of young’s space. Through questionnaires and interviews, this study investigates young adults’ needs and usage of young adult space in public libraries, their satisfaction with young adult space, and influencing factors behind their satisfaction with young adult space to build four dimensions including 28 indicators for reference to future design of young adult space in public libraries. The statistical analyses of the retrieved questionnaires indicate the following conclusions: (1) the types of books young adults read most frequently are novels, comics and journals/magazines; their favorite topics are recreation, popular cultures and tourism; (2) teenagers usually read two books for extracurricular reading monthly; their average reading time is one or two hours; most of their purposes are personal interests, killing time, and entertainment. (3) the frequency of young adults' use of libraries is once a week; the frequency of young adults' use of young adult space is once a month; the reasons for young adults using young adult space are self-studying or preparing for examinations, reading and borrowing books, and its comfortable environment; (4) the categories of books young adults read most frequently mainly are fiction, comics, and literature/prose; the mostly-used facilities and services are reading tables and sofas; (5) the top five satisfaction items among the four public libraries are “It can satisfy my needs of reading/learning without any disturbance,” “It can provide sufficient light,” “It is a safe, clean and comfortable place,” “Its book arrangement lets me easily find books,” and “The categories and quantity of books can meet my needs.” (6) The analysis of the top five satisfactory services shows that teenagers of the four libraries unanimously agree with the items of “It is a safe place,” and “I can seek help from librarians in time;” on the other hand, they are unanimously unsatisfied with the recreation service, dining space as well as artistic creation; (7) through the four-quadrant map analysis, users of four libraries are in urgent need of the improvement in the item “Its book arrangement lets me easily find books.” (8) among the 28 indicators, junior high school students consider “plan and design of young adult space” more important than senior ones; users of young adult space in National Library of Public Information especially think “It meets my dining needs” more important than users of the other three libraries; (9) "different levels of school and different libraries" is one of the factors that influences the satisfaction of young adults; (10) compared with the study of Chu, Yi-Hsien (2012) and Chiwang, Mei-Wen (2013), teenagers generally hope that young adult space can meet their requirement for studying without any disturbance and socializing. Teenagers in Puli Library are still unsatisfied with air conditioning, reading tables and chairs, and searches for information; (11) teenagers in four libraries are all satisfied with the library space after rearrangement. According to the conclusions, the study suggests as the follows: (1) the four libraries should rearrange the displays of books in youth space; (2) National Taiwan Library should re-examine the environment and space design of its youth space; (3) New Taipei City Teenager Library should improve sound insulation of its youth space, to meet users needs; (4) National Library of Public Information should improve the stability of networks in its youth space; (5) Puli Library should reducethe temperature of its youth space.