1 INTRODUCTION  
2 BACKGROUNDS AND CATEGORIZATION  
2.1 Large Language Models  
2.2 Multimodal Large Language Models  
2.3 Data-Centric AI and Why Data-Centric MLLMs  
2.4 Categories of Data-Centric MLLMs  
3 DATA COLLECTING AND PROCESSING  
4 DATA-CENTRIC PRE-TRAINING  
5 DATA-CENTRIC ADAPTATION  
6 EVALUATION  
7 FUTURE DIRECTION  
8 CONCLUSION