This study conducted a content analysis of narrative articles and research papers on filial therapy published in Taiwanese professional journals over 29 years (1996–2024). Content analysis serves several functions: describing trends in the evolution of a research field, identifying important issues, highlighting neglected areas, clarifying research concepts and models, and understanding the contributions of the literature. The objectives of this study are as follows: First, to examine the changes and developments in the number of articles and research papers on filial therapy published in Taiwan from 1996 to 2024, as well as the number of journals in which they appeared. Second, to analyze the research topics, characteristics of research participants, research methods, and scales used by Taiwanese researchers in filial therapy from 1996 to 2024. Third, to provide an overview of research results on filial therapy in Taiwan during this period. Fourth, to provide references for researchers and practitioners, thereby promoting both the academic development and practical effectiveness of filial therapy in Taiwan. A total of 37 narrative articles and research papers were reviewed. Annual publications and discussions were examined. The analysis was conducted in nine categories: type and number of publications, journals of publication, research topics, research participants, research methods, research tools, and research results. The results and suggestions of this study are as follows: 1. The ten-week filial therapy model designed by Garry Landreth was the main theoretical foundation. 2. Literature on filial therapy is influenced by societies, publications, social phenomena, policies, and laws in the field. For example, the Association for Taiwan Play Therapy was established in December 2005 and began publishing the Journal of Taiwan Play Therapy in 2011. Research on filial therapy has increased overall; however, during the COVID-19 pandemic, the number of academic research studies declined due to government regulations such as social distancing. 3. Research participants and topics in filial therapy are diverse and wide-ranging. 4. Future research should focus on the suitability, quantification, and quality of filial therapy, as well as the effects of intervention, follow-up, and generalization. 5. In the initial developmental stage of filial therapy in Taiwan, most articles were discursive, while research papers experimented with issues of applicability. 6. Research and practice of filial therapy with men need to be continued. 7. Localized Chinese models of filial therapy should be developed. Notably, Taiwan’s filial therapy has integrated elements of Chinese dietary culture to construct localized practices—comparing the kitchen to the playroom and parent-child cooking to filial play. By drawing on the cultural significance of eating, another model of filial therapy has been explored, which is indeed worthy of recognition. Finally, this study found that if filial therapy is explored from cross-cultural, local, and systemic perspectives, or if different models of filial play therapy are integrated and developed, filial therapy can move toward a localized and indigenized model suitable for Taiwanese families. This article demonstrates that Taiwan is already on the path toward constructing a localized parent-child play therapy model, and it is hoped that this study will serve as a reference for future academic research and practice.