周期或几乎周期现象普遍存在于自然界中，而借助微分方程可更好地描述这些现象的动力学行为。而时滞效应常常伴随在一些实际系统中，将分别研究一类带有状态依赖时滞的周期驱动的微分方程和几乎周期驱动的微分方程。利用Schauder不动点定理，分别建立所研究方程的周期解与几乎周期解的存在性判据。同时，最后给出两个例子一一例证文中所得到的主要结果的可行性。

The periodic or almost periodic phenomena are commonly found in the natural world. And some real systems usually contain the effects of time delays, differential equations with delay depending on state forced by periodicity and almost periodicity are investigated, respectively. By Schauder's fixed point theorem, the criteria of the existence of periodic and almost periodic solutions to the equations are shown. Finally, two examples will be given to illustrate the effectiveness of the main results.