In this study, we mainly aim at the problem that Wi-Fi provisioning of the smart goods in home always takes too much time but hard to troubleshoot. Based on detailed study of “Soft AP” and “Simple Config” which are most commonly used for WiFi provisioning of smart goods, we proposed a new research method in which packet capture is involved among the cell phones, smart goods, and corresponding servers to locate the issues. By applying this method to research time-effectiveness of WiFi provisioning for smart water heater and smart air conditioner, we successfully located the key segments and factors that impact the time-effectiveness. The optimization measures based on the research result have reduced the time consumed on WiFi provisioning a lot, and improved the user experience greatly.