This study adopts a variety of research methods widely used in professional academic fields covering regional science, management science and policy science. The essence of each method is selected for cross-field analysis that is beyond the framework of different fields, departments and layers. Through the public affairs management (PAM) method, the reference architecture is integrated for analysis, and the output of regional analysis (including comparative analysis, economic foundation analysis, variance appropriation analysis, time series analysis and cross-sectional analysis, gravity model) is used as input data for the project analysis (the nominal group technique). The outputs of regional analysis and project analysis are used as input for the interactive management (IM) method in a policy analysis; the outputs of the first three analyses are further used as the input to the social judgments theory (SJT) of the judgment analysis. A set of proposals is then created using VCS, and the survey questionnaire is created using SJT and multi-attribute utility theory (MAUT) by IM participants in generating strategies. These are sent to 53 public administrators in the Penghu County Government for them to fill out. The results are analyzed using the serial intention structure of the SJT method to identify the cooperation elements among all units. The historical data in Penghu is then further analyzed using appropriate research methods to calculate a set of objective and mutually supporting data. The participants¡¦ psychological perception are further quantified with all kinds of resource links swept across each node, enabling different types of energy to diffuse to their maximum for creation of the greatest possible public values. This study was conducted by a team of three students taking an interactive approach to exploring issues regarding the impact of strategy in cooperation between Penghu and China's Economic Zone on the Western Side of the Taiwan Strait. The team worked together to conduct literature research, examining issues related to public living within the aspects of economy, society and government. The study uses the interactive management (IM) method widely used in policy analysis, together with process analysis methods such as the nominal group technique (NGT) method and the interpretive structural modeling (ISM) method, with 26 participants from various sectors. In the NGT process, starting from idea generation, problem clarification, and voting on problems, the issues were compared pair-wise. ISM software was used for generating an enforcement structural diagram, which was reviewed by participants; over half approved on the twelve strategies in the governmental aspect of cooperation between Penghu and China¡¦s Economic Zone on the Western Side of the Taiwan Strait study, in addition to the revised and approved enforcement structural diagram. This paper focuses on using the IM method for analysis. During the planning stage, information generated by varieties of research methods was used for deliberate review by the parties of interest. During the interactive test stage, the purpose was to make sure that the 26 participants are representative of the public. Therefore, 15-20 observers came from the same population for simultaneous voting and pair-wise comparison of rules. The results produced were almost identical, indicating that the participants invited in the IM method were representative enough. In the follow-up stage, the Penghu Cable Company was supportive to air the promotional interactive DVD, with contents connoting public welfare and social education, for free for one month from April 1, 2009 to April 30, 2009. Afterwards, the twelve major strategies as voted were sent to 10 administrative units, of which five replied and agreed to adopt; More voices of the majority of people will then be heard, effective opinions adopted and, together with cross-border governmental policies and people¡¦s needs, the public opinions will be blended into public policies. The method will serve as a bridge between the Government and the public, enabling people to do a final evaluation on the government's performance or even facilitating the Central Government to listen to people¡¦s responses when allocating subsidy funds to cities and counties. tThis study will propose a concrete strategy on ¡§competitiveness in cooperation between Penghu and China's Economic Zone on the Western Side of the Taiwan Strait¡¨, by surveying county government public administrators with SJT and MAUT questionnaires. A total of 53 county government public administrators generally agreed that the Government should proactively expand services to improve the employment rate. In summary, if the governmental sector is able to take the public interests and county public services as the top priority issues, as well as expressing a willingness to listen to people¡¦s opinion and incorporate people¡¦s needs into the policies, a flourishing and peaceful realm of the people, by the people, for the people and based on the people is achievable in the near future.