220V current measurement?
I just find IC that ACS709 but I could not be sure whether it is okay
or not

The ACS709 is fine for power AC mains applications. It's not so good for high speed SMPS current monitoring because it only has a bandwidth of 120 kHz (unlike the ACS730 series which is good for up to 1 MHz).
The main useful feature in either model is that the input current sensing is galvanically isolated from the analogue output interface and this means you don't need a transformer to provide electrical protection but, it's still connected to mains AC so care must be taken when laying out the PCB to ensure creepage and clearance distances are maintained.
However, both devices are somewhat ambiguous on their isolation capacitance so don't expect perfect behaviour if your line voltage is quite noisy. This particularly applies to measuring current in SMPS circuits if your measurement point is on a high-speed switching node - you will get significant cross talk that can spoil an otherwise nice rendition of the current signal you are trying to measure.
Make sure you choose one that is suitable for the current peaks you are trying to monitor because significant over-range can cause oddball effects on the device that are hard to debug/understand.