The purpose of this study was to observe the behavior of Chisese infant under the strange situations test developed by Ainsworth in order to understand (1) the relationship between the mother and the exploralory behavior of her infant; (2) the influences of the stranger and the strange situation on the behavior of infant; (3) the effect of separation from the mother on the behavior of infant; (4) the classification of attachment among Chinese infants; (5) the suitability of the strange situations test to be used with Chinese infants. 62 infants of one years old from Taipei and their mothers were invited as the subject. They were observed according to the standard procedure used by Ainsworth. The following resultes were found. 1. This study has comfirmed Ainsworth´s point of view that the mother is the security base of her infant while he is exploring the environment. 2. The presence of the stranger it1 the strange situation produced great effect on the infant´s behavior. Their exploratory behavior were sharply reduced and their attachment behavior were significantly increased in strength. 3. Most of the subjects had shown separation anxiety when their mother left the observation room. These induced separation experiences had increased the frequency of crying and searching for the mother on the part of infants. The reunion with the mother had in creased infants´ explortory behavior, the strength of seeking proximity to and maintaining contact with the mother. 4. Among the 62 infant subjects, 47 were classified as the securred attachment group, 11 as th avoidance group and 4 as the ambivilance group. The distribution of each group was similar to those of Ainsworth´s study but different from those found in Germany, Isarel and Japan. 5. The behavior characteristics of differint attachment type shown in the strange situation were significantly different. Infants of avoidant type had shown weak attachment relationship with their mothers. The infants of ambivilent type had shown high level of anxiety and insecurity. Their needs for keeping poximity to their mothers, making efforts for physical contact and trying to maintain contact were very strong. However, they also showed strong resistence to their mothers at the same time. 6. The strange situation test was a stress producing instrument which has produced changes on infant´s behavior in concordance with Ainsworth´s expectation. Therefore, it can be used with Chinese infants.