The purpose of this study is to investigate into how the qualifications for new group of experts or Bo-mo have been shaped and defined, and what social significance the emergence of Bo-mo` had. Bo-mo refers to a type of female care-givers or teachers who are engaged in the institutionalized children edu-care center. The childhood edu-care which had been limited to the private sphere for a long time, shifted to be regarded as a public responsibility ever since the Kindergarten or Nursery schools started to emerge. Bo-mo was unique and distinguishable from other female teachers at the primary, middle and high school levels, because these Bo-mos were trained in different schools(namely, Bo-Yuk-HAK-Kyo, or Kindergarten Training School) with a different curriculum In other words, they were newly emerging experts whose major responsibility was to take charge of childhood edu-care. Bo-mo was an attractive occupation among women students at the time. At times, Bo-mo was major target on social criticism in especially the heated dispute over of Kindergarten`s education was whether good or bad. The intrinsic limit of Ba-mo emerging since modem was that Bo-mos were elite women but considered nothing but ``mothers`` in the public sector. In other words, Bo-mo is the ``secondary mother`` created by male intellectual-Frobel-and those women, perfectly manifested patriarchal forces and male``s occupation of female.