Abstract: This research aimed to examine conflict conditions, examine the impact towards the conflicts and develop the approaches to strengthen the conciliation and harmony to solve the conflicts in Pathum Thani. This research applied the mixed method between quantitative research by distributing 2,800 questionnaires to people in 7 districts of Pathum Thani and 400 people each and the qualitative research by studying the documents on interviewing and arranging the forum for important informants, i.e., academicians, administrators of the governmental agencies in Pathum Thani and 65 chief executives of the local administrative organization in Pathum Thani as well as observing the activities leading to the harmony in the society and politics. This research analyzed the quantitative data by using descriptive statistics, i.e., frequency, percentage, means and standard deviation and inferential statistics, i.e., independent t-test, one way ANOVA, pairwise comparison by LSD Pearson correlation and multiple regression and analyzed the qualitative data through interpretation and logical assumption and then describing the research result. The result could be concluded as follows: the overall of the conflict conditions in Pathum Thani was at the moderate level ( = 3.21, SD = 1.15). When considering by factors, most of them related to conflicts in political ideology ( = 3.42, SD = 1.08). The factors affecting the conflicts were differences in favor of political ideology, liking different political parties, liking different politicians and benefits from political endorsement, so that, they attempt to make the political party or the politicians they endorse to win the election for the benefits from administration and exercising administrative authority. Moreover, the political conflicts in Pathum Thani resulted from the intervention of political system. The political powers have intervened local politics and lead to the conflicts, especially, for political leaders influencing people because most of the people believe in the leaders. If the leaders have conflicts and separation, people will also have separation the same as the leaders. The approach to strengthen the conciliation an harmony was to solve the conflict by collaboration ( = 3.63, SD = 1.01). The important approaches to strengthen the conciliation were using the activities as an instrument to strengthen the conciliation of people in the commconciliation, especially, for the public interest activities for the public or benefits for all and organizing the activities continuously. To carry out the activities require the process for people at all levels, genders, age and communities to have an opportconciliation to participate the activities to discuss and express their opinion independently and mutually make a decision and take action. Therefore, the process of solving the conflicts through collaboration needs to have the consensus of collaborative activities through participative process from expressing opinion, making decisions, taking action, evaluating, getting benefits from participative activities from expressing opinions, making decisions, taking action, evaluating and getting benefits from the mentioned activities of people related to the conflicts.