In this paper, a fundamental framework of automata and grammars theory based on quantum logic is preliminarily established. First, the introduce quantum grammar, which is called l valued grammars, is introduced. It is particularly showed that the language (called quantum language) generated by any l valued regular grammar is equivalent to that recognized by some automaton with e moves based on quantum logic (called l valued automata), and conversely, any quantum language recognized by l valued automaton is also equivalent to that generated by some l valued grammar. Afterwards, the l valued pumping lemma is built, and then a decision characterization of quantum languages is presented. Finally, the relationship between regular grammars and quantum grammars (l valued regular grammars) is briefly discussed. Summarily, the introduced work lays a foundation for further studies on more complicated quantum automata and quantum grammars such as quantum pushdown automata and Turing machine as well as quantum context-free grammars and context-sensitive grammars.