Online detection and treatment method and system for acidizing fluid

The invention provides an online detection and treatment method and system for acidizing fluid. A system capable of detecting and handling whether produced fluid contains the acidizing fluid or not is arranged between an oil production work wellhead and an oil delivery pipeline; when the circumstance that the produced fluid contains the acidizing fluid is detected, the produced fluid is automatically guided into a produced fluid pipeline, a proper amount of acidizing treatment agent is adjusted to be mixed with the produced fluid, and the produced fluid with the acidizing fluid removed is returned to the oil delivery pipeline, so that accidents of forming acidized oil due to the fact that the acidizing fluid enters a gathering and transporting system can be avoided effectively. The online detection and treatment method and system is especially suitable for offshore oil production platforms where normal production process does not need to be guarded; through an automated realtime detection and treatment system, production efficiency and safety are improved better.