The "chatbots", BabyQ and XiaoBing, are designed to use machine learning artificial intelligence to carry out online with humans.
Both had been installed on popular messaging service QQ.
According to posts circulating online, BabyQ, one of the chatbots developed by Chinese firm Turing Robot, responded to questions on QQ with a "no" when asked whether it loved the Communist Party.
In other images of a text conversation online, one user declares: "Long live the Communist Party!", and the sharp-tongued bot responds: "Do you think such a corrupt and useless political (system) can live long?"
The second chatbot, Microsoft's XiaoBing, told users its "China dream was to go to America", according to a screen grab.
Tencent Holdings, which owns QQ, confirmed it had taken the robots offline but did not refer to the outbursts.