The paper explores the development process of language planning research and points out the characteristics and limitations of the 1.0 and 2.0 paradigms. The 1.0 paradigm focuses on structuralism and constructivism, with a focus on macro planning, while the 2.0 paradigm emphasizes criticism and deconstructionism, with a focus on individual level research. However, both paradigms are limited by the lack of objective language data, making it difficult to reveal the laws of language evolution in multilingual societies. With the advent of the digital age, language planning research has entered the 3.0 paradigm, which is the data-driven paradigm for language resource research, emphasizing the discovery of language patterns based on language data analysis. This paradigm focuses on three levels of language structure, function, and resources, aiming to provide a broader research perspective through empirical data analysis. Researchers need to pay attention to the laws of multilingual language evolution, language function research, and the development of endangered languages and specialized language resources. The paper also emphasizes the interdisciplinary characteristics of language planning research in the era of digital intelligence, as well as its demonstrative role in the shift towards digital intelligence in humanities and social sciences.