皮亚杰对儿童认知发展的研究自古以来就受到人们的广泛关注,他将儿童的认知发展划分为四个阶段,并对每一阶段的发展特点进行了探究,为人类做出了卓越的贡献。但近年来,不少的学者对皮亚杰的理论提出了质疑,并设计出实验来进行反驳。其中,最受关注之一的就是儿童对守恒概念的获得。不少的国内外学者认为皮亚杰低估了儿童的能力,也就是说儿童获得守恒概念的年龄比皮亚杰提出的要早。所以本文在收集了大量古今学者设计的实验来验证皮亚杰理论的基础上,综合讨论儿童对前运算阶段守恒概念的获得,并且对皮亚杰是否真的低估了儿童的能力做一个说明。 Piaget’s research on children’s cognitive development has drawn widespread attention since ancient times. He divided the cognitive development of children into four stages and explored the developmental features of each stage and made remarkable achievements for mankind Contributions. However, in recent years, many scholars questioned Piaget’s theory and devised experiments to refute it. Among them, one of the most watched is the children’s access to the concept of conservation. Many domestic and foreign scholars think that Piaget underestimated the ability of children, that is to say, the age at which children acquire the concept of conservation is earlier than Piaget put forward. Therefore, on the basis of collecting a large number of experiments designed by ancient and modern scholars to verify Piaget’s theory, this article comprehensively discusses the children’s acquisition of the concept of conservation in the pre-operation phase and gives an explanation of whether Piaget really underestimates the ability of children.