In the process of designing early childhood education environment, the countries’ standards regarding the law and legislations become decisive. When the Turkey is handled in that respect and the differences of the educational environment provided at the early childhood education institutions are considered, it may be concluded that there is no national standard in the relevant legislation. The purpose of this study was to examine the indoor and outdoor environment standards of Turkey (2015), Singapore (2016), Australia (2016), New Zealand (2018), and Switzerland (2019) comparatively. Document analysis, which is one of the qualitative research methods, was used for this purpose. Data collection process was conducted through this method, so early childhood education environment standards manuals of Turkey (2015), Singapore (2016), Australia (2016), New Zealand (2018), and Switzerland (2019) were examined. As a result of the data analysis, it was seen that there are similar and different aspects regarding the standards of preschools’ indoor and outdoor environment properties of the countries. Therefore, effort put on to improve national standards of pre-schools in terms of indoor-outdoor educational environment and inspecting these educational institutions regarding compliance with these standards of is highly important.