[2] The text part of the logo is the company's abbreviation Chinese “ 青岛地铁 ” and English capital “QINGDAO METRO”.

The graphical part is based on the English word initials “Q” (as for Qingdao) as the main element.

A 2.8 km (1.7 mi) extension to the north opened in 2023.Project Proposal (1935) In 1935, Qingdao proposed an urban development plan that included the construction of "inner city high-speed transportation" systems, specifically rail transit express lines.

The planners emphasized the importance of early preparation, cautioning against neglecting the project simply because the need for high-speed transportation seemed distant.

First Construction Attempt (1987-2000) In April 1987, Qingdao officially began planning and conducting feasibility studies for a rail transit network.

The National Planning Commission suspended the approval of feasibility study reports and construction starts.

This marked the official start of preliminary work on the new metro test section, with its scope initially defined.

During the construction of Line 3, various challenges such as geological issues and relocation difficulties caused delays.

The Phase 2 construction plan (2013-2021) of Qingdao Metro was approved by National Development and Reform Commission in April 2016.

[16] The Phase 3 construction plan (2021-2026) of Qingdao Metro was approved by National Development and Reform Commission on August 19, 2021.

At the exit, one-way tickets are collected, and fares are deducted for stored-value card users.

Staffed Service Machines (BOM): Located at the station service center, these machines allow staff to help with issues like ticket refunds, lost or invalid cards, overcharges, and other problems that can’t be resolved by the TVMs.

Self-Service Terminals (STT): Also at the station service center, these terminals are for passengers inside the paid area to handle their own ticket-related tasks, such as card updates, balance inquiries, and resolving ticket issues.

On April 13, 2018, the ground collapsed near the Haixin Bridge Station in the western section of Line 2 and there were no casualties.

On November 26, 2018, a partial detachment occurred during the 01-2 workspace jet operation of Line 8 B2, causing a worker to fall from the work platform and die after being sent to the hospital for rescue.

On December 20, 2018, a production accident occurred at a construction site on Line 4, killing one person.

On February 20, 2023, At the Shilaoren Beach Station project site of Line 5, an accident occurred while repairing a rotary drilling rig, resulting in the death of a maintenance worker.