在台灣地區，由於社會變遷亟遽，經濟高度發展，人口增加與都市化的發展，竊盜犯罪問題日益嚴重；根據民意調查分析，國內民眾最為關心的，除了「經濟發展」就是「治安良窳」的議題。台灣地區自1999至2003年，每年至少有18萬輛以上的機車失竊，約有8萬輛以上找不回來；每年機車失竊，約流失新台幣152億元，因此機車竊盜問題值得深究。而，台北縣為全國人口的第一大縣，縣民幾近於每2人即擁有1輛機車，故以台北縣作探討，可以做為典範。 本研究透過三角交叉檢視法，以自行編制機車竊盜問卷之量化研究為主，有效問卷400份，再輔以參與觀察法及訪談法。訪問對象為國內實際操作之在職基層警察。 本研究重要發現：將機車竊盜問卷資料歸類成專業技能、防竊觀點、肅竊經驗、心態反應、服務品質與自我期待等區分六項。就基層警察使用電腦資訊而言，可推論仰賴「機械的垂直思考模式」的被動性，較「廣泛的水平思考模式」主動性為高。造成機車竊盜破獲率低的相關原因，有「不了解機車竊盜者，竊盜機車的過程」、「員警心態消極」、「法律審理流程冗長」、「贓物保管不易」、「追贓能力不足」以及「不了解機車竊盜者竊盜機車後的銷贓管道」等因素。大多數基層警察對研究機車竊盜問題之意願低落，陷入「想做，但不會做；想問，又不知怎麼問？要問誰？」的迷思。 另外；在基層警察問卷調查的回應中顯示：對於執行「行政介入」工作，感覺並不困難，但並不能真正了解以行政手段取代司法強制的意涵。基層警察受理報案的觀念正確而又積極；造成犯罪黑數，發生遲、匿報的原因，非在個人懶惰及想卸責、推諉、怕麻煩等因素；並從員警根本就不願意吃案，認為「提升警察專業能力」，可以提昇民眾對治安的滿意度。 本研究結果，具體提出了「行政介入」的刑事策略等防範竊盜的措施之道。「行政介入」的刑事策略，預期可使機車竊盜的發生率降低；那麼，民生痛苦指數必然是下降的、民眾對治安的滿意度也將會提昇，不啻是民眾、政府與警察間的的三贏，「優良治理」的刑事政策，會影響改善治安的期待效果，將獲得更進一步的確認。因而，本文具有理論以及實務上的貢獻。 / The theft crime is getting worse in Taiwan due to rapid social change, economic development, population growth, and urbanization. According to public opinion polls, Taiwanese are concerned deeply about either economic development or public security. More than 180 thousand motorcycles have been stolen during 1999 to 2003. Among these amounts, about 80 thousand motorcycles cannot be found thereafter. The average cost of those missed motorcycles is approximate 15.2 billion NT dollars every year. Therefore, the topic of preventing motorcycle from theft has to be further researched. Taipei County was selected as a case in this research for the reason that it is the most populous county in Taiwan and nearly one out of two residents owns a motorcycle. This research adopted the triangulation approach mainly by quantitative research with questionnaires. The valid questionnaires are 400 copies. In addition, this research also used the participant observation and interviewing as the auxiliary method. The defined interviewees to be sampled were the practitioners from the local police forces. The significant finding from this research: the questionnaires are categorized into six sections including professional skill, anti-theft awareness, theft tackling experience, emotion expression, service quality and self expectation. According to the custom of local polices using computer information the local polices could be inferred that they depend on the inactive「mechanical vertical thinking pattern」 more than on the active「wide lateral thinking pattern」. Several reasons cause the low clearance rate such as they don’t realize the thief and process of motorcycle theft, passiveness, lengthy judiciary process, difficulty to keep loots, incapability to trace the source of loots, not realizing the way how to sell loots and etc. Most of local polices have low intention for doing research on the motorcycle theft problem. They are facing the dilemma of incapability to solve the problem or no access to consultant. Furthermore, the response from questionnaires reveals that it is not difficult for local polices to acknowledge executing public intervention. However, they cannot comprehend the meaning of using public intervention to substitute for the judiciary enforcement. The conception of local polices for receiving theft cases is rarely accurate and active. The reasons causing dark figures of crime, delay cases and concealment are not because of local polices’ laziness and irresponsibility. The local polices are unwilling to cover up the reported theft cases. From the point of view, promoting police’s professional capability could uplift the satisfaction in public security from the citizens. The research finding has provided concrete solutions for theft prevention through the penal strategies of public intervention. The penal strategies in public intervention could be expected to reduce the motorcycle theft. Therefore, the misery index would be decreased and the satisfaction in public security will be improved. It is a win-win strategy among the public, government and police. The good governance in penal strategies can affect the expected results in bettering public security. This outcome will be further verified in the research. Thus, the research has its theoretical and practical contributions. Key words：public intervention good governance