Google DeepMind has developed a new AI system called PromptBreeder. It can automatically generate prompts suitable for a given task based on its description, thereby enhancing the performance of large language models on that task. PromptBreeder achieves self-reference and self-improvement through an evolutionary algorithm-based approach. Research shows that it outperforms the most advanced prompting technologies on benchmark tasks such as commonsense reasoning, arithmetic, and ethics. This indicates that future more powerful language models may benefit from this self-improvement strategy. PromptBreeder offers an effective pathway for enhancing the autonomy of LLMs.