The purpose of this study was to analyze and compare the agonistic behaviors and reconciliation in captive and free-ranging Formosan macaques (Macaca cyclopis). The dominance style of Formosan macaques was compared with long-tailed, rhesus and Japanese macaques. I have used scan, focal sampling and ad libitum on aggressions of adult macaques. I have recorded post-conflict (PC) focal samplings on victims and compared those with matched control (MC) focal samplings. Agonistic behaviors had significantly higher frequency in captive than in free-ranging Formosan macaques. The frequencies of hostile and submission were significantly higher in captive than in free-ranging Formosan macaques. The captive adult females of higher rank had higher frequency of threat and hostile, and lower frequency of submission. Threat was the most frequent aggression (52-72%) expressed by both the captive and free-ranging adult monkeys. The victims in captive and free-ranging Formosan macaques usually submitted immediately after aggression (82-89%). The proportion of counter aggression in captive and free-ranging Formosan macaques were relative low (9-16%). The aqerage conciliatory tendency for adult Formosan macaques was 14.3% to 19.6%. The affiliative contacts in PC and MC in captive and free-ranging Formosan macaques were striking that both preferred grooming. The Formosan macaques significantly reconciled more during PC than MC period both in captive and free-ranging conditions. In addition, both had significantly more attracted than dispersed PC-MC pairs. The conciliatory tendencies in captive and free-ranging Formosan macaques were similar regardless of kin and non-kin partners. This study indicated that Formosan macaques were close to the macaques of Fascicularis group. Therefore, Formosan macaques had a despotic dominance style as suggested by Phylogenetic hypotheses.