Teacher's knowledge, skills and attitudes are important aspects of competence in the implementation of curriculum. These three aspects are interrelated with each other to ensure that the implementation of the curriculum achieves the intention of the NPSC (Revision 2017). The implementation of the national preschool curriculum (NPC) in this context is based on the National Preschool Standards-Based Curriculum (NPSC) (Revised 2017). This concept paper provides reviews on the competence of teachers, and the challenges of implementing NPC among preschool teachers. The results of the survey found that teachers' knowledge and skills about NPC were still at a moderate level. In addition, teachers were also found to be less skilled in the implementation of their special curriculum from the aspect of teaching and learning strategies (TnL). However, from the aspect of attitude, preschool teachers have a positive attitude towards the curriculum implemented. There were three main challenges faced by preschool teachers in the implementation of the preschool curriculum, namely the lack of training related to curriculum exposure, lack of knowledge and skills regarding the curriculum, and lack of experience in the field of early childhood education. In this concept paper, the researcher also put forward some suggestions related to the competence of preschool teachers in the implementation of the NPC to improve the quality of this curriculum implementation.