Emphasis was placed on the importance of innovative research methods in language policy and planning research, particularly in obtaining data on planning outcomes. For interviews with young children (3-6 years old), traditional interview methods face challenges due to their limited cognitive and expressive abilities. However, as the direct target of family language education planning, the perspective of young children is crucial for understanding the effectiveness of the plan. To overcome these challenges, researchers have proposed the interview method of "situational integration and cognitive projection". This method effectively addresses the limitations of research methods by integrating interview contexts with children's life situations and promoting children's language production through cognitive projection. For example, conducting interviews in familiar contexts for children, or allowing children to express their views through hypothetical situations, can facilitate smoother interviews. This method has shown its effectiveness in practical research, but further exploration and improvement are still needed to ensure its reliability and validity.