Nowadays, the number of cases that caregivers feel difficult in getting along with children has been greatly increased both in Japan and China. This is mainly due to the fact that the background of children's problematic behaviors are becoming more complex , but in order to provide effective support for children with various issues, it is necessary to first conduct an accurate assessment. In this study, by conducting a questionnaire survey on caregivers in Japan and China, we first compared whether caregivers are actually able to make accurate assessments of children with issues, as well as factors that may affect accurate assessment, such as training, learning, and face-to-face communication time with parents. The results of analysis are as followed.First, the scores on the attachment assessment tended to be higher in China, while the scores on the developmental assessment were significantly higher in Japan. Then, training time had an impact on the accuracy of the assessment, but not learning time. Furthermore, face-to-face communication time with parents had a positive impact on the attachment assessment, but a negative impact on the developmental assessment. In addition, all three were significantly higher in China. According to these results, Chinese caregivers may be better able to work with parents than Japanese ones, but the developmental assessment scores were lower in China, even though the training and learning time were longer, which suggested the need to improve the quality of training and learning, rather than focusing only on length of time. In addition, developmental assessment may have a completely different mechanism than that of attachment. So, it will be necessary to conduct more specific research on the factors necessary for accurate attachment and developmental assessment, and to consider meaningful training plans with the aim of further improving the assessment skills and qualifications of caregivers.